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VON DUPRIN INC

Overview
  • Total Patents
    228
About

VON DUPRIN INC has a total of 228 patent applications. Its first patent ever was published in 1966. It filed its patents most often in United States, Canada and EPO (European Patent Office). Its main competitors in its focus markets civil engineering, machines and electrical machinery and energy are TRI MARK CORP, SPEP ACQUISITION CORP and TAKIGEN MFG CO.

Patent filings per year

Chart showing VON DUPRIN INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Coleman Michael D 48
#2 Cohrs Richard B 33
#3 Mader Gerald E 33
#4 Haeck Paul J 27
#5 Fritsch Theodore J 17
#6 Dye William P 17
#7 Foster John R 13
#8 Waltz Kevin P 12
#9 Nigro Daniel N Jr 11
#10 Muller Peter H 11

Latest patents

Publication Filing date Title
US2007246946A1 Latchbolt for a door lock assembly
US2007246947A1 Door lock assembly
US2006010942A1 Control for exit device
US2005258933A1 Electronic security system
US2002029526A1 Electric strike field-selectable fail-safe/fail-secure mechanism
EP1063375A1 Inertial blocking mechanism for use with an exit device
CA2308351A1 Roller guide for a deadbolt
US6409232B1 Exit alarm lock assembly with push pad pivotally interconnected to deadbolt
CA2308266A1 Deadbolt
CA2307706A1 Switching assembly for an exit alarm lock
CA2239328A1 Privacy latch with auto-release feature
US5927765A Dogging device for a latch assembly
US5690501A Electrical power transfer for 3/4" offset pivots
US5609371A Push pad trigger release exit device with infinite deadlocking
US5794382A Fire rated removable mullion
US5658026A Door handle locking mechanism with dual function springs
US5664816A Lever handle assembly with field adjustable tailpiece and lever handing
FR2710941A1 Pneumatic lock apparatus for exits
CA2117995A1 Door latch holding force adjustment assembly
CA2117996A1 Lead-in device for aiding the installation of rim-type lock cylinders