Assignee
SARGENT & GREENLEAF
US·60 granted patents·2 pending applications·1,493 citations·filing 1974–2020
Top patents by PatentIndex Score
62 records- 0196US6016677ADead bolt combination lock and push-pull lock, each with integrated re-locking features, lock with auxiliary security features, and lock keypad with tamper detection and response featuresSARGENT & GREENLEAF·Filed 1998·Granted Jan 25, 2000·93 cites·8 claims
- 0296US4961330AHigh security panic exit systemSARGENT & GREENLEAF·Filed 1990·Granted Oct 9, 1990·119 cites·29 claims
- 0394US3953769AElectronic security control systemSARGENT & GREENLEAF·Filed 1974·Granted Apr 27, 1976·82 cites·22 claims
- 0492US5473922AMotorized electronic lockSARGENT & GREENLEAF·Filed 1993·Granted Dec 12, 1995·151 cites·11 claims
- 0591US6212923B1Lock including means for sensing position of bolt and for indicating whether or not bolt is extended from lock caseSARGENT & GREENLEAF·Filed 1998·Granted Apr 10, 2001·58 cites·4 claims
- 0683US3991596ATumbler wheel, changeable combination key lock constructionSARGENT & GREENLEAF·Filed 1976·Granted Nov 16, 1976·34 cites·14 claims
- 0782US6510587B2Door closure prevention apparatus and methodSARGENT & GREENLEAF·Filed 2001·Granted Jan 28, 2003·40 cites·20 claims
- 0882US4776187AChangeable key cylinder exposed shackle padlockSARGENT & GREENLEAF·Filed 1987·Granted Oct 11, 1988·49 cites·15 claims
- 0982USD262601SCombined changeable panel handle and hub having locking pin and key lock cylinder for safe doors and the likeSARGENT & GREENLEAF·Filed 1979·Granted Jan 12, 1982·16 cites·1 claims
- 1081US4083212ARotary disc tumbler cylinder lockSARGENT & GREENLEAF·Filed 1977·Granted Apr 11, 1978·39 cites·20 claims
- 1181US3968667ACombination lock constructionSARGENT & GREENLEAF·Filed 1975·Granted Jul 13, 1976·33 cites·17 claims
- 1277US4241594ASlide cover type changeable key plug padlockSARGENT & GREENLEAF·Filed 1979·Granted Dec 30, 1980·31 cites·18 claims
- 1376US5647235ATamper-evident electronic combination lock having integral bearing/retaining memberSARGENT & GREENLEAF·Filed 1995·Granted Jul 15, 1997·32 cites·26 claims
- 1474US5640862AElectronic combination lock including a sensor arrangement which senses the position and direction of movement of the combination dialSARGENT & GREENLEAF·Filed 1995·Granted Jun 24, 1997·33 cites·12 claims
- 1569US10415270B2High security electrochemical lockSARGENT & GREENLEAF·Filed 2016·Granted Sep 17, 2019·2 cites·49 claims
- 1669USD266395SCombination lock fence lever for bank vaults, safe doors and the likeSARGENT & GREENLEAF·Filed 1980·Granted Oct 5, 1982·11 cites·1 claims
- 1769US3983728ADouble changeable key lock for safe deposit boxes and the likeSARGENT & GREENLEAF·Filed 1974·Granted Oct 5, 1976·24 cites·19 claims
- 1867US6196037B1Lock system enabling user to lock door and extend lock bolt in a single action and push-pull lock with cushioning arrangement for protecting bolt drive componentsSARGENT & GREENLEAF·Filed 1998·Granted Mar 6, 2001·33 cites·7 claims
- 1967US4763496AHigh security changeable key cylinder type shackle padlockSARGENT & GREENLEAF·Filed 1987·Granted Aug 16, 1988·31 cites·20 claims
- 2067US4359886AKey lock cylinder for possibly contaminated environmentsSARGENT & GREENLEAF·Filed 1981·Granted Nov 23, 1982·28 cites·27 claims
- 2166US4455552ACombination locks with electro-optical silent alarm systemSARGENT & GREENLEAF·Filed 1981·Granted Jun 19, 1984·31 cites·6 claims
- 2264US10669744B2Mechanical override of an electronic lockSARGENT & GREENLEAF·Filed 2016·Granted Jun 2, 2020·2 cites·19 claims
- 2364US4887445AElectronic lock for hotel room safes and the likeSARGENT & GREENLEAF·Filed 1989·Granted Dec 19, 1989·65 cites·18 claims
- 2464US4062210ATime locksSARGENT & GREENLEAF·Filed 1976·Granted Dec 13, 1977·17 cites·16 claims
- 2562US5816084AElectronic combination lock with an arrangement for moving a locking lever both into and out of an "engage" position in which lock may be openedSARGENT & GREENLEAF·Filed 1997·Granted Oct 6, 1998·19 cites·50 claims
- 2662US4404823AView limiting dial and ring structure for combination locks and the likeSARGENT & GREENLEAF·Filed 1980·Granted Sep 20, 1983·22 cites·17 claims
- 2761US6094952ADead bolt combination lock with integrated re-locking featuresSARGENT & GREENLEAF·Filed 1998·Granted Aug 1, 2000·25 cites·9 claims
- 2860US10032328B2Non-intrusive dial rotation detection of high security locksSARGENT & GREENLEAF·Filed 2015·Granted Jul 24, 2018·1 cites·15 claims
- 2958US4462230AChangeable safe deposit lock with slidable clamped fencesSARGENT & GREENLEAF·Filed 1982·Granted Jul 31, 1984·20 cites·16 claims
- 3058US4107965APadlock having knuckle type anti-wedge-attack structureSARGENT & GREENLEAF·Filed 1977·Granted Aug 22, 1978·18 cites·11 claims
- 3157US4651546AHigh security rotary disc, pin tumbler type cylinder lockSARGENT & GREENLEAF·Filed 1986·Granted Mar 24, 1987·16 cites·15 claims
- 3257US4631940ADigital readout combination lock dial assemblySARGENT & GREENLEAF·Filed 1985·Granted Dec 30, 1986·48 cites·19 claims
- 3356US5613388AElectronic combination lock entering a lockout mode after a number of successive incorrect combination entriesSARGENT & GREENLEAF·Filed 1995·Granted Mar 25, 1997·18 cites·17 claims
- 3456US4163376ATumbler wheel combination locks with torque adjuster meansSARGENT & GREENLEAF·Filed 1978·Granted Aug 7, 1979·17 cites·24 claims
- 3556US2020291685A1Electromechanical lockSARGENT & GREENLEAF·Filed 2020·Application pending·0 cites
- 3655US4269050ATime lock with kicker arm carrier actuatorSARGENT & GREENLEAF·Filed 1978·Granted May 26, 1981·13 cites·24 claims
- 3754US4102161AEnshrouding lock device for paired locking bars and the likeSARGENT & GREENLEAF·Filed 1977·Granted Jul 25, 1978·14 cites·22 claims
- 3854US2020011092A1High security electromechanical lockSARGENT & GREENLEAF·Filed 2019·Application pending·0 cites
- 3953US4290287ADouble changeable key lock for safe deposit boxes and the likeSARGENT & GREENLEAF·Filed 1979·Granted Sep 22, 1981·14 cites·12 claims
- 4052US10134208B2System and method of initializing and controlling locksSARGENT & GREENLEAF·Filed 2014·Granted Nov 20, 2018·3 cites·10 claims
- 4150US5502990ARecodable lever tumbler lock for use in high security safesSARGENT & GREENLEAF·Filed 1994·Granted Apr 2, 1996·16 cites·8 claims
- 4248US9964284B2Light for keypad bezelSARGENT & GREENLEAF·Filed 2014·Granted May 8, 2018·0 cites·18 claims
- 4348US5632169ASelf powered electronic combination lock having comprehensive monitoring of power levels for various functionsSARGENT & GREENLEAF·Filed 1995·Granted May 27, 1997·31 cites·13 claims
- 4445US4776190ARadiological detection resistant key changeable combination lockSARGENT & GREENLEAF·Filed 1987·Granted Oct 11, 1988·11 cites·26 claims
- 4542US4643010ATwo movement time lockSARGENT & GREENLEAF·Filed 1985·Granted Feb 17, 1987·11 cites·17 claims
- 4642US4359883ATime delay combination lockSARGENT & GREENLEAF·Filed 1980·Granted Nov 23, 1982·8 cites·22 claims
- 4742US4102162APadlock having guided wedges for resisting destructive wedge attackSARGENT & GREENLEAF·Filed 1977·Granted Jul 25, 1978·9 cites·11 claims
- 4841US4875351AElectronic time lockSARGENT & GREENLEAF·Filed 1988·Granted Oct 24, 1989·13 cites·16 claims
- 4941US4375159AChangeable combination tumbler wheel type key lockSARGENT & GREENLEAF·Filed 1981·Granted Mar 1, 1983·12 cites·20 claims
- 5040US4224814ATime lock having releasable carrier latching deadboltSARGENT & GREENLEAF·Filed 1979·Granted Sep 30, 1980·7 cites·16 claims
Showing the top 50 of 62 patent records by PatentIndex Score.
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