Assignee
VON DUPRIN INC
US·68 granted patents·2,021 citations·filing 1978–2006
Top patents by PatentIndex Score
68 records- 0196US5011199APanic exit device having an exit-delaying mechanismVON DUPRIN INC·Filed 1989·Granted Apr 30, 1991·96 cites·30 claims
- 0293US4741563ACenter case assembly, and a universal, center case sub-assemblyVON DUPRIN INC·Filed 1986·Granted May 3, 1988·80 cites·4 claims
- 0393US4305612AApparatus for operating a door latching and unlatching deviceVON DUPRIN INC·Filed 1978·Granted Dec 15, 1981·62 cites·4 claims
- 0491US5464259ADoor latch assembly with meltable fuse mechanismVON DUPRIN INC·Filed 1993·Granted Nov 7, 1995·72 cites·6 claims
- 0591US5184855AElectromagnetic door lock assemblyVON DUPRIN INC·Filed 1991·Granted Feb 9, 1993·93 cites·33 claims
- 0691US4628496AUltrasonic sensing and monitoring systemsVON DUPRIN INC·Filed 1984·Granted Dec 9, 1986·65 cites·58 claims
- 0788US5412961AExit delaying mechanism for panic exit doorVON DUPRIN INC·Filed 1993·Granted May 9, 1995·65 cites·9 claims
- 0888US5085475AExit-delaying mechanism, for a panic exit deviceVON DUPRIN INC·Filed 1991·Granted Feb 4, 1992·72 cites·9 claims
- 0988US4601499AOperating mechanism for a closure latching assemblyVON DUPRIN INC·Filed 1984·Granted Jul 22, 1986·73 cites·14 claims
- 1085US5658026ADoor handle locking mechanism with dual function springsVON DUPRIN INC·Filed 1995·Granted Aug 19, 1997·69 cites·6 claims
- 1183US7249477B2Control for exit deviceVON DUPRIN INC·Filed 2005·Granted Jul 31, 2007·19 cites·22 claims
- 1282US5520427ABreakaway lever with wedge release mechanismVON DUPRIN INC·Filed 1993·Granted May 28, 1996·45 cites·8 claims
- 1380US7832777B2Door lock assemblyVON DUPRIN INC·Filed 2006·Granted Nov 16, 2010·18 cites·36 claims
- 1479US7616090B2Electronic security systemVON DUPRIN INC·Filed 2004·Granted Nov 10, 2009·24 cites·20 claims
- 1578US6595563B2Electric strike field-selectable fail-safe/fail-secure mechanismVON DUPRIN INC·Filed 2001·Granted Jul 22, 2003·41 cites·22 claims
- 1678US5927765ADogging device for a latch assemblyVON DUPRIN INC·Filed 1997·Granted Jul 27, 1999·52 cites·25 claims
- 1778US4658664ARack and pinion assemblyVON DUPRIN INC·Filed 1985·Granted Apr 21, 1987·33 cites·15 claims
- 1878US4427223ALatching deviceVON DUPRIN INC·Filed 1981·Granted Jan 24, 1984·40 cites·12 claims
- 1976US4949505ADoor cordinatorVON DUPRIN INC·Filed 1989·Granted Aug 21, 1990·37 cites·8 claims
- 2076US4847950ASelf retained axle pin assembly for shear applicationVON DUPRIN INC·Filed 1988·Granted Jul 18, 1989·39 cites·13 claims
- 2174US6409232B1Exit alarm lock assembly with push pad pivotally interconnected to deadboltVON DUPRIN INC·Filed 2000·Granted Jun 25, 2002·21 cites·19 claims
- 2272USD430786SEnd cap for a door exit device push padVON DUPRIN INC·Filed 2000·Granted Sep 12, 2000·20 cites·1 claims
- 2370US5484179AFailsafe electric locking lever trimVON DUPRIN INC·Filed 1993·Granted Jan 16, 1996·27 cites·12 claims
- 2470US5067757APanic exit device having noise suppressionVON DUPRIN INC·Filed 1990·Granted Nov 26, 1991·36 cites·6 claims
- 2569USD541633SExit device centercase coverVON DUPRIN INC·Filed 2005·Granted May 1, 2007·18 cites·1 claims
- 2669US5904384APush pad trigger release exit device with infinite deadlockingVON DUPRIN INC·Filed 1997·Granted May 18, 1999·26 cites·13 claims
- 2769US5762385APush pad trigger release exit device with infinite deadlockingVON DUPRIN INC·Filed 1996·Granted Jun 9, 1998·27 cites·2 claims
- 2868US6304177B1Switching assembly for an exit alarm lockVON DUPRIN INC·Filed 2000·Granted Oct 16, 2001·21 cites·13 claims
- 2968US5673949APush pad trigger release for a vertical rod exit deviceVON DUPRIN INC·Filed 1996·Granted Oct 7, 1997·27 cites·2 claims
- 3068US4974890AUniversal assembly for top and bottom latches, in vertical-rod exit devices, and top and bottom latches for such devicesVON DUPRIN INC·Filed 1989·Granted Dec 4, 1990·26 cites·11 claims
- 3167USD433307SPush padVON DUPRIN INC·Filed 2000·Granted Nov 7, 2000·16 cites·1 claims
- 3267US4437693AThermally responsive latching device and method of modifying a latching deviceVON DUPRIN INC·Filed 1981·Granted Mar 20, 1984·22 cites·11 claims
- 3366US7722096B2Latchbolt for a door lock assemblyVON DUPRIN INC·Filed 2006·Granted May 25, 2010·6 cites·28 claims
- 3466US5609371APush pad trigger release exit device with infinite deadlockingVON DUPRIN INC·Filed 1995·Granted Mar 11, 1997·25 cites·7 claims
- 3566US5035450ADoor exit-delaying meansVON DUPRIN INC·Filed 1990·Granted Jul 30, 1991·32 cites·13 claims
- 3665USD434339SCover for an exit alarm lockVON DUPRIN INC·Filed 2000·Granted Nov 28, 2000·19 cites·1 claims
- 3765US4641866ALever handle door trimVON DUPRIN INC·Filed 1985·Granted Feb 10, 1987·20 cites·6 claims
- 3864US5372394APneumatic controlled exit deviceVON DUPRIN INC·Filed 1993·Granted Dec 13, 1994·29 cites·13 claims
- 3963US5690501AElectrical power transfer for 3/4" offset pivotsVON DUPRIN INC·Filed 1995·Granted Nov 25, 1997·27 cites·3 claims
- 4063US5450697ARemovable cylinder locked mullion assemblyVON DUPRIN INC·Filed 1994·Granted Sep 19, 1995·33 cites·11 claims
- 4163US5139293AArmature assembly for electromagnetic door holderVON DUPRIN INC·Filed 1991·Granted Aug 18, 1992·30 cites·10 claims
- 4263US4978151ALatch-operating mechanism for a panic egress deviceVON DUPRIN INC·Filed 1989·Granted Dec 18, 1990·21 cites·6 claims
- 4362US5184856ADoor lock armature assemblyVON DUPRIN INC·Filed 1992·Granted Feb 9, 1993·31 cites·20 claims
- 4461US5133581AElectromagnetic lock assemblyVON DUPRIN INC·Filed 1991·Granted Jul 28, 1992·22 cites·5 claims
- 4560US5794382AFire rated removable mullionVON DUPRIN INC·Filed 1995·Granted Aug 18, 1998·27 cites·11 claims
- 4659US5445423ABreakaway lever clutchVON DUPRIN INC·Filed 1993·Granted Aug 29, 1995·25 cites·20 claims
- 4754US6485066B1Exit alarm lock deadbolt having guide supportsVON DUPRIN INC·Filed 2000·Granted Nov 26, 2002·9 cites·7 claims
- 4854US5664816ALever handle assembly with field adjustable tailpiece and lever handingVON DUPRIN INC·Filed 1995·Granted Sep 9, 1997·24 cites·12 claims
- 4954US5450651AEnd cap locking overhead mounted door holder assemblyVON DUPRIN INC·Filed 1993·Granted Sep 19, 1995·23 cites·14 claims
- 5054US5446944ARocker latch overhead door holder assemblyVON DUPRIN INC·Filed 1993·Granted Sep 5, 1995·19 cites·7 claims
Showing the top 50 of 68 patent records by PatentIndex Score.
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