MDI Product -- Cap lock for sign stand - U.S. Patent No. 5,472,162
4814DLK, 4814DLK-KD, 4814DLK-SNET, 4814HDK

MDI Product -- Portable collapsible sign and stand (Compact Signs and Stand) - U.S. Patent No. 5,829,178

24-SQ Compact Signs, 30-SQ Compact Signs, 36-SQ Compact Signs, 48-SQ Compact Signs 3612DLK, 4814DLK, 4814HDK

MDI Product -- Sign stand for flexible traffic control signage - U.S. Patent No. 6,056,250

MDI Product -- 24-SQ Compact Signs -U.S. Patent No. 6,056,250

MDI Product -- 30-SQ Compact Signs - U.S. Patent No. 6,056,250
DCP-35137, DCP-35138, DCP-35202, DCW-35139

MDI Product -- 36-SQ Compact Signs - U.S. Patent No. 6,056,250
DCF-03640, DCF-03642, DCF-03644, DCF-03649, DCF-03655, DCF-03657, DCF-03765, DCF-03989, DCF-04092, DCF-04094, DCF-04096, DCF-04100, DCF-04102A, DCF-04104A, DCF-04106, DCF-04201, DCF-04203, DCF-04215, DCF-04393, DCF-04488, DCF-04682, DCF-04925, DCF-05167, DCF-05173, DCF-05186, DCF-05391, DCF-05681, DCF-07034A, DCF-07103, DCF-09482 , DCF-09699, DCF-09972, DCF-10192 , DCF-13601, DCF-16618, DCF-16622, DCF-16623, DCF-16682, DCF-16739, DCF-16740, DCF-16776-SA, DCF-16826, DCF-16843, DCF-27003, DCF-27861, DCF-28072, DCF-28360, DCF-28361, DCF-28557, DCF-28599, DCF-35124, DCF-35162, DCF-35172, DCF-35309, DCF-35383, DCF-35385, DCF-35491, DCF-35499, DCF-39589, DCF-39635, DCF-39757, DCF-39847, DCF-39853, DCF-39872, DCF-43145, DCF-43149, DCF-43157, DCF-43161, DCF-43173, DCF-43196, DCF-43198, DCF-43271, DCF-43272, DCF-43273, DCF-43274, DCF-43304, DCF-43356, DCF-43357, DCF-43371, DCF-43439, DCF-43440, DCF-43441, DCF-43442, DCF-43443, DCF-43484, DCF-43485, DCF-43515, DCF-43552, DCF-43553, DCF-43632, DCF-43677, DCF-43694, DCF-43695, DCF-43726, DCF-43763, DCF-43807, DCF-43833, DCF-52108, DCF-52114, DCF-52115, DCF-52162, DCF-52189, DCF-52200, DCF-52216, DCF-52217, DCF-52369, DCF-52386, DCF-52387, DCF-52388, DCFG-03765, DCFG-05185, DCFG-09972, DCFG-16747, DCFG-28608, DCM-43409, DCM-43535, DCM-52334, DCP-03642, DCP-03655, DCP-03657, DCP-03765, DCP-04094, DCP-04100, DCP-04106, DCP-04211, DCP-04215, DCP-04332, DCP-04342, DCP-04393, DCP-05167, DCP-05185, DCP-05186, DCP-05187, DCP-05188, DCP-05663, DCP-07103, DCP-09305, DCP-09699, DCP-09972, DCP-13601, DCP-28072, DCP-28243, DCP-28244, DCP-28343, DCP-28577, DCP-28606, DCP-28607, DCP-28610, DCP-35115, DCP-35129, DCP-35130, DCP-35162, DCP-35285, DCP-35294, DCP-35295, DCP-35375, DCP-35376, DCP-35382, DCP-35420, DCP-35421, DCP-39597, DCP-39598, DCP-39703, DCP-39771, DCP-39803, DCP-39830, DCP-39872, DCP-43147, DCP-43152, DCP-43190, DCP-43202, DCP-43251, DCP-43254, DCP-43258, DCP-43259, DCP-43275, DCP-43276, DCP-43318, DCP-43321, DCP-43323, DCP-43324, DCP-43379, DCP-43417, DCP-43418, DCP-43419, DCP-43420, DCP-43439, DCP-43508, DCP-43570,DCP-43635, DCP-43673, DCP-43674, DCP-43675, DCP-43690, DCP-43756, DCP-43810, DCP-43824, DCP-52102, DCP-52168, DCP-52186, DCP-52343, DCP-52389, DCP-52394, DCW-04110, DCW-04322-G, DCW-04322-GT, DCW-04332, DCW-05167, DCW-05167-R, DCW-05167R, DCW-05185, DCW-05185-B, DCW-05185-G, DCW-05186, DCW-05186-Y, DCW-05187, DCW-05187-RB-SA, DCW-05187-RR-SA, DCW-05187A-R, DCW-05188, DCW-07580, DCW-09305, DCW-09699, DCW-16777-SA, DCW-39598-B, DCW-39709, DCW-43312, DCW-43459-R, DCW-43483, DCW-43570, DCW-43650, DCW-43651, DCW-43693, DCW-43909-B, DCY-04332, DCY-05167, DCY-05167-SA, DCY-05185-SA, DCY-05186-SA, DCY-05187, DCY-05663, DCY-09757, DCY-09808, DCY-09809, DCY-09972, DCY-16702, DCY-16742, DCY-16797, DCY-28167, DCY-28577, DCY-35123, DCY-35191, DCY-35239, DCY-35240, DCY-35322A, DCY-35385, DCY-35387, DCY-35495, DCY-39489, DCY-39598, DCY-39732, DCY-43328, DCY-43340, DCY-43413, DCY-43425, DCY-43426, DCY-43435, DCY-43439, DCY-43440, DCY-43441, DCY-43442, DCY-43443, DCY-43568, DCY-43633, DCY-43681, DCY-43682, DCY-43735, DCY-43748, DCY-43749, DCY-43750, DCY-43751, DCY-43752, DCY-43753, DCY-43823, DCY-52102, DCY-52161, DCY-52236, DCY-52317, DCY-52323, DCY-52425, DCF-03640-F, DCF-03642-F, DCF-03644-F, DCF-03649-F, DCF-03655-F, DCF-03657-F, DCF-03765-F, DCF-03989-F, DCF-04092-F, DCF-04094-F, DCF-04096-F, DCF-04100-F, DCF-04102A-F, DCF-04104-F, DCF-04106-F, DCF-04196-F, DCF-04201-F, DCF-04203-F, DCF-04215-F, DCF-04409-F, DCF-04925-F, DCF-04991-F, DCF-05391-F, DCF-05681-F, DCF-07044-F, DCF-09470-F, DCF-09699-F, DCF-09728-F, DCF-09972-F, DCF-16745-F, DCF-16753-F, DCF-27038-F, DCF-28403-F, DCF-28560-F, DCF-35290-F, DCF-38190-F, DCF-39497-F, DCF-39546-F, DCF-39598-F, DCF-39766-F, DCF-43356-F, DCF-52178-F, DCF-52242-F, DCF-52342-F, DCF-52433-F, DCF-52434-F, DCM-04203-F, DCP-03642-F, DCP-03655-F, DCP-03657-F, DCP-03765-F, DCP-04100-F, DCP-04106-F, DCP-04215-F, DCP-04393-F, DCP-07103-F, DCP-09699-F, DCP-09972-F, DCP-38190-F, DCP-39507-F, DCP-39656-F, DCP-52389-F, DCW-04110-F, DCY-04332-F, DCY-05167-F, DCY-13601-F, DCY-39726-F, DCF-04112-F, DCF-07462, DCF-16872-F, DCF-28360-F, DCF-28361-F, DCF-52340-F, DCY-16876 DCF-16682-F, DCF-43726-F, DCF-43763-F, DCF-28491-F, DCY-05681, DCM-04682, DCF-52334, DCF-04112, DCW-16972, DCW-16971, DCP-35322A, DCY-17001, DCY-17008 DCP-17026, DCP-17039, DCF-09436, DCFG-17040, DCF-17050, DCP-04096, DCP-17052, DCP-17053, DCP-17069 DCF-59774, DCY-39847, DCF-04116, DCF-59794, DCF-52396, DCM-03989-F, DCF-52242, DCF-59832, DCF-59828, DCF-59849, DCF-04205, DCF-07034, DCF-04991, DCP-59892, DCF-43204, DCF-04409, DCF-59934, DCY-59936, DCY-59937, DCY-59938, DCF-59939, DCF-59941, DCF-10063, DCY-59949, DCP-59988, DCY-43190, DCF-60002, DCF-60003, DCF-35122, DCF-60009, DCM-04096, DCW-16747-RB-SA, DCP-35123, DCF-60025, DCF-28380, DCP-17057, DCW-35345,DCP-60066, DCP-60065, DCP-60064, DCF-60074, DCF-09733, DCF-03659A, DCF-28325, DCP-60106, DCP-60121, DCP-30132, DCF-07250, DCP-60154, DCF-43445, DCF-60168, DCF-64407,DCW-64412, DCF-64428, DCF-64429, DCF-64431, DCP-64430, DCF-28491, DCM-28491, DCM-52388, DCF-28491, DCP-09757, DCW-64477, DCW-64476, DCP-64478, DCF-64475, DCP-05681, DCF-09699, DCF-09699A-F, DCF-04322-SA, DCF-10192-F, DCP-64505, DCP-09699A, DCF-09699A, DCF-64509,DCP-64536, DCP-64561,DCY-64569-F, DCF-64580, DCP-04092, DCF-09728, DCF-43637, DCF-64593,DCF-16900,DCF-64596

MDI Product -- 48-SQ Compact Signs - U.S. Patent No. 6,056,250
DCF-03641, DCF-03643, DCF-03645, DCF-03650, DCF-03656, DCF-03658, DCF-03660, DCF-03766, DCF-04091, DCF-04093, DCF-04095, DCF-04097, DCF-04101, DCF-04103A, DCF-04105A, DCF-04107, DCF-04113, DCF-04129, DCF-04204D, DCF-04405, DCF-04411, DCF-04519, DCF-04521, DCF-05179, DCF-05682, DCF-07006, DCF-07035A, DCF-07084, DCF-07096, DCF-07134, DCF-07164, DCF-07612, DCF-09308, DCF-09423, DCF-09438, DCF-09452, DCF-09487, DCF-09489, DCF-09493, DCF-09570, DCF-09671, DCF-10208, DCF-10212, DCF-16647, DCF-16670, DCF-16691, DCF-16779, DCF-16801, DCF-16802, DCF-16808, DCF-16861, DCF-16863, DCF-27049, DCF-27929, DCF-27975, DCF-28073, DCF-28079, DCF-28264, DCF-28266, DCF-28280, DCF-28472, DCF-28505, DCF-28579, DCF-28586, DCF-28593, DCF-28613, DCF-35160, DCF-35258, DCF-35287, DCF-35448, DCF-35474, DCF-39499, DCF-39508, DCF-39571, DCF-39572, DCF-39636, DCF-39733, DCF-39740, DCF-39758, DCF-39794, DCF-39844, DCF-39845, DCF-39849, DCF-39854, DCF-43172, DCF-43220, DCF-43284, DCF-43311, DCF-43333, DCF-43410, DCF-43429, DCF-43499, DCF-43511, DCF-43543, DCF-43554, DCF-43555, DCF-43573, DCF-43594, DCF-43617, DCF-43618, DCF-43620, DCF-43645, DCF-43646, DCF-43665, DCF-43666, DCF-43714, DCF-43808, DCF-43812, DCF-43816, DCF-43817, DCF-43841, DCF-43882, DCF-43886, DCF-43887, DCF-43888, DCF-43902, DCF-43910, DCF-43911, DCF-43912, DCF-43913, DCF-43914, DCF-43915, DCF-43920, DCF-52113, DCF-52147, DCF-52173, DCF-52174, DCF-52182, DCF-52199, DCF-52215, DCF-52229, DCF-52230, DCF-52251, DCF-52264, DCF-52265, DCF-52266, DCF-52322, DCF-52356, DCF-52357, DCF-52411, DCF-52412, DCF-52413, DCFG-16829, DCFG-27975, DCFG-43672, DCFG-43701, DCFG-43808, DCFG-52305, DCFG-52306, DCFG-52401, DCFG-52402, DCM-03643, DCM-03645, DCM-03650, DCM-03658, DCM-03766, DCM-04097, DCM-04204, DCM-04405, DCM-09423, DCM-35247, DCM-43585, DCM-52418, DCP-03643, DCP-03656, DCP-03658, DCP-03766, DCP-04101, DCP-04103A, DCP-04105A, DCP-04107, DCP-04113, DCP-04117, DCP-07084, DCP-07152, DCP-09423, DCP-09432, DCP-09452, DCP-09477, DCP-09493, DCP-16650, DCP-16681, DCP-16683, DCP-16701, DCP-16805, DCP-27831, DCP-27929, DCP-27975, DCP-28073, DCP-28074, DCP-28264, DCP-28323, DCP-28543, DCP-28569, DCP-28570, DCP-28593, DCP-28594, DCP-35131, DCP-35132, DCP-35176, DCP-35245, DCP-35342, DCP-35346, DCP-35354, DCP-35448, DCP-35479, DCP-35498, DCP-35510, DCP-39566, DCP-39582, DCP-39663, DCP-39721, DCP-39786, DCP-43186, DCP-43250, DCP-43295, DCP-43296, DCP-43298, DCP-43299, DCP-43301, DCP-43302, DCP-43309, DCP-43374, DCP-43392, DCP-43464, DCP-43475, DCP-43586, DCP-43596, DCP-43601, DCP-43620, DCP-43630, DCP-43680, DCP-43703, DCP-43767, DCP-43806, DCP-43808, DCP-43822, DCP-43870, DCP-43871, DCP-43872, DCP-43873, DCP-43900, DCP-43901, DCP-43902, DCP-43908, DCP-43933, DCP-52140, DCP-52179, DCP-52180, DCP-52181, DCP-52182, DCP-52191, DCP-52195, DCP-52257, DCP-52282A, DCP-52419, DCW-04517, DCW-28593, DCW-28593-R, DCW-35448, DCW-43334, DCW-43335, DCW-52423, DCY-09778, DCY-16835, DCY-16845, DCY-28593, DCY-28594, DCY-35323A, DCY-35448, DCY-43300, DCY-43315, DCY-43530, DCY-43702, DCY-43733, DCY-43734, DCY-43825, DCY-43826, DCY-43827, DCY-43853, DCY-52207, DCY-52424, DCF-03641-F, DCF-03643-F, DCF-03645-F, DCF-03650-F, DCF-03656-F, DCF-03658-F, DCF-03766-F, DCF-04091-F, DCF-04093-F, DCF-04095-F, DCF-04097-F, DCF-04101-F, DCF-04103A-F, DCF-04105A-F, DCF-04107-F, DCF-04117-F, DCF-04197-F, DCF-04202-F, DCF-04204-F, DCF-04206-F, DCF-04411-F, DCF-04519-F, DCF-04521-F, DCF-04912-F, DCF-04926-F, DCF-05682-F, DCF-07084-F, DCF-07164-F, DCF-09395-F, DCF-09423-F, DCF-09567-F, DCF-09671-F, DCF-16631-F, DCF-16715-F, DCF-27049-F, DCF-27059-F, DCF-27941-F, DCF-27975-F, DCF-28073-F, DCF-28266-F, DCF-28512-F, DCF-28578-F, DCF-35209-F, DCF-35286-F, DCF-35289-F, DCF-35507-F, DCF-39482-F, DCF-39483-F, DCF-39484-F DCF-39485-F, DCF-39672-F, DCF-39759-F, DCF-39844-F, DCF-39862-F, DCF-39863-F, DCF-43140-F, DCF-43171-F, DCF-43187-F, DCF-43373-F, DCF-43684-F, DCF-43768-F, DCF-43769-F, DCF-43801-F, DCF-43802-F, DCF-43803-F, DCF-52222-F, DCM-03643-F, DCM-03650-F, DCM-03766-F, DCM-04091-F, DCM-04093-F, DCM-04095-F, DCM-04097-F, DCM-04197-F, DCM-04204-F, DCP-03643-F, DCP-03658-F, DCP-03766-F, DCP-04095-F, DCP-04101-F, DCP-04107-F, DCP-07084-F, DCP-09423-F, DCP-09477-F, DCP-09493-F, DCP-16847-F, DCP-27975-F, DCP-28073-F, DCP-35269-F, DCP-35396-F, DCP-39652-F, DCP-39664-F, DCP-39675-F, DCP-39828-F, DCP-43215-F, DCP-43707-F, DCP-52329-F, DCY-03766-F, DCY-07164-F, DCY-43727-F, DCF-04117, DCF-04202, DCF-04206, DCF-04912, DCF-04926, DCF-16870, DCF-16915, DCF-16916, DCF-28055, DCP-07043, DCW-10037 DCW-27049, DCF-09921, DCY-16935, DCF-16919, DCP-16807, DCF-28372, DCF-09433-F, DCP-04912,DCF-16938-F, DCF-16992, DCF-16977, DCF-16944, DCF-16986, DCF-07152, DCF-43624-F, DCF-09567, DCF-10049-F, DCF-04197, DCF-10283-F, DCF-35515-F, DCF-16978-F, DCF-16939-F, DCM-04103, DCM-04105, DCM-04107, DCP-16933, DCF-07612-F, DCF-27929-F, DCF-10101, DCF-17006, DCF-17005, DCF-43162, DCF-43649, DCM-04095, DCY-43649, DCW-17010, DCP-28464, DCP-17004, DCF-17034, DCW-17093, DCP-07164, DCF-59776, DCF-59777, DCF-59778, DCF-17079, DCF-07043C, DC3-04202, DCY-59792, DCF-59795, DCF-59798, DCF-59812, DCF-59810, DCM-04202-F, DCM-09423-F, DCF-59831, DCF-09688, DCF-28237,DCP-59839,DCM-43172,DCF-07570-F DCF-09489-F, DCF-09490-F,DCF-43684,DCF-52345, DCF-39861, DCF-28185, DCF-59898, DCF-09739, DCF-09596, DCF-35247,DCM-09308, DCP-59910, DCF-59925, DCP-59928, DCP-52305, DCM-17034, DCF-52173-F, DCF-52174-F, DCF-59955, DCM-39679, DCM-28492, DCF-59958, DCM-04107-F, DCP-59986, DCF-59987, DCW-09423, DCP-10103, DCP-27029, DCF-07043C, DCF-60054, DCF-60056, DCF-16877, DCF-60055, DCF-43130, DCF-43820, DCF-28020, DCF-04489, DCM-60054,DCF-60083,DCF-10257, DCY-60024,DCF-60113, DCF-60129, DCF-60122,DCP-60135, DCP-60138, DCF-60142, DCFM-60148, DCF-60155, DCF-28423, DCF-60160, DCF-59867, DCF-43179, DCF-27973, DCF-16856, DCF-64408, DCP-64414, DCP-64417, DCF-64418, DCF-28492, DCF-09901, DCP-64434, DCF-27941, DCY-64454, DCF-52294DCF-39679, DCF-09901-F, DCF-64466-F, DCF-28237-F, DCM-17072, DCP-16691, DCF-04486, DCW-64497,DCW-64498, DCW-64496, DCY-64495, DCW-64504, DCF-09423A, DCF-28091, DCF-64513, DCF-64518, DCF-64517, DCP-09423A-F, DCF-64525, DCF-52294-F, DCF-39648, DCP-64527, DCF-04113-F, DCF-04486-F, DCF-09487-F, DCP-28015, DCF-04923A-F, DCP-28014, DCP-64549, DCF-09433, DCP-09423A, DCF-64562-F, DCF-10182, DCF-09432, DCF-39593, DCW-09423A, DCF-60122, DCF-64566, DCP-64576, DCY-64577, DCF-43598, DCP-63589, DCF-43398, DCP-64604, DCF-64576,

MDI Product -- Flag holder bracket for sign stand - U.S. Patent No. 6,427,964
SA-10002, 4860KC, 4860KC-1, 4860KC-1BULK, 4860KC-2, 4860KC-2BULK, 4860KC-3, 4860KC-3BULK, 4860KCBULK, 4860NLC, 4860NLCBULK, 4812KC, 4812KC-1 4812KC-1BULK, 4812KC-2, 4812KC-2BULK, 4812KC-3, 4812KC-3BULK, 4812KCBULK, 4818AZ, 4818AZBULK, 4818KC, 4818KC-1, 4818KC-1BULK, 4818KC-2, 4818KC-2BULK, 4818KC-3, 4818KC-3BULK, 4818KCBULK, 4818NLC,SA-11421-F, 5018RU, 5018NS 5018SS, 4860KCAZ-2BULK, DL-12549-F, DLX-28440, DL-12550-F, DLX-28441,SA-10080, 4884KE-2BULK, 4884KE-3BULK, 4884KET, 4884KET-1BULK, 4884KET-2, 4884KET-2BULK, 4884KET-3, 4884KET-3BULK,SA-13338-F, 4815RBKC-60, 4815RBKC-60-1 4815RBKC-60-2, 4815RBKC-60-3, 4860KC-2BULKZ, 4812KC-2DLK, 5018KD, 5018KD-BULK, 5018KD-1, 5018KD-1BULK, 5018KD-2, 5018KD-2BULK, 5018KD-3, 5018KD-3BULK, 5018KDNS-1, 5018KDNS-2, 5018KDNS-2BULK, 5018KDNS-3, 5018KD-3KD, 5018KD-40-2BULK, 5018KDNSR-2BULK, SA-5018KDR, 5018KDR-2BULK, 4818KC-4, 4818KC-4BULK, 5018NSALJBCBULK, 5018K-JBC-BULK ,

MDI Product -- Fold-up sign panel assembly - U.S. Patent No. 6,606,809
24-SQ Compact Signs, 30-SQ Compact Signs, 36-SQ Compact Signs, 48-SQ Compact Signs

MDI Product -- Portable sign stand with leg release mechanism - U.S. Patent No. 6,755,381
4818KC-1WI, 4815RBKC, 4815RBKC-BULK, 4814HDKD, 3015KC, 4814NSCKD, 5012NSAL, 5012NSAL-BULK, 4814CAMUA, 4814DLKD, 4814SL, 3612DLKC, 3612DLKC-SA, 3612NU, 4884KE-2BULK, 4884KE-3BULK, 2022RBK, 40CAMKDAL, 4814SSCKD, 4814SSCKDBULK, 5012SSAL, 5012SSAL-BULK, 5012SSALPT, 5012SSALH, 4815RBKC-60, 4815RBKC-60-1, 4815RBKC-60-2, 4815RBKC-60-3, 4884KET, 4884KET-1BULK, 4884KET-2, 4884KET-2BULK, 4884KET-3, 4884KET-3BULK, 4818NS-32-LEG, 4850RBKCKD 30CAMKD, 30CAMKDDT, 5012NS, 5012NSBULK, 5012NSDL, 5012NSDL-BULK, 5018NS, 40CAMKD, 40CAMKDBULK, 5012SS, 5012SSBULK, 5018SS, 40CAMKDST, 5018K-JBC-BULK, 5018KD, 5018KD-BULK, 5018KD-1, 5018KD-1BULK, 5018KD-2, 5018KD-2BULK, 5018KD-3, 5018KD-3BULK, 5018KD-2BULKNF, 5018KDNS-1, 5018KDNS-2, 5018KDNS-2BULK, 5018KDNS-3, 5018KDNSR-2BULK, 5018KDR-2BULK, 5018KD-3KD

MDI Product -- Portable sign stand with sign release mechanism - U.S. Patent No. 7,458,554
SA-35470, SA-43921A, 5012NSDL, 5012NSDL-BULK, SA-43595, SA-43921SU, 3612DLKC, 3612DLKC-SA, 4814DLKD, 4814HDKD

MDI Product -- Warning flag deployment system - U.S. Patent No. 8,162,284

MDI Product -- Railway service vehicle having wheelchair restraint rail response trailer - U.S. Patent No. 8,413,588

MDI Product -- Adapt For Hitch Mounted Sign - U.S. Patent No. 8,726, 552
SA-43921A, SA-43921DFB, SA-43921SU