Assignee
HARTWELL CORP
US·116 granted patents·4,114 citations·filing 1975–2022
Top patents by PatentIndex Score
116 records- 0198US6343815B1Cinch-up latchHARTWELL CORP·Filed 2000·Granted Feb 5, 2002·185 cites·19 claims
- 0297US5620212ALow profile hook latch assemblyHARTWELL CORP·Filed 1995·Granted Apr 15, 1997·182 cites·6 claims
- 0397US4828299ALatchHARTWELL CORP·Filed 1987·Granted May 9, 1989·129 cites·17 claims
- 0497US4116479AAdjustable flush mounted hook latchHARTWELL CORP·Filed 1977·Granted Sep 26, 1978·133 cites·7 claims
- 0596US5984382AExtended reach latchHARTWELL CORP·Filed 1998·Granted Nov 16, 1999·173 cites·10 claims
- 0695US6755448B2Blowout latchHARTWELL CORP·Filed 2002·Granted Jun 29, 2004·81 cites·17 claims
- 0795US5413391ASelf-closing latchHARTWELL CORP·Filed 1993·Granted May 9, 1995·125 cites·15 claims
- 0895US4114509AFastener plunger entry resistance meansHARTWELL CORP·Filed 1977·Granted Sep 19, 1978·75 cites·2 claims
- 0994USD973463SAircraft latch lock key headHARTWELL CORP·Filed 2022·Granted Dec 27, 2022·2 cites·1 claims
- 1094US10392830B2Clevis sensing lockHARTWELL CORP·Filed 2015·Granted Aug 27, 2019·12 cites·13 claims
- 1194US6513841B1Blowout latchHARTWELL CORP·Filed 2000·Granted Feb 4, 2003·63 cites·22 claims
- 1294US4602812AAdjustable double hook latchHARTWELL CORP·Filed 1983·Granted Jul 29, 1986·92 cites·3 claims
- 1394US3988808AReadily mounted separable fastenerHARTWELL CORP·Filed 1975·Granted Nov 2, 1976·110 cites·10 claims
- 1493US4318557ALatching mechanismHARTWELL CORP·Filed 1979·Granted Mar 9, 1982·80 cites·3 claims
- 1593US3964364AInitially single piece rotatable fastenerHARTWELL CORP·Filed 1975·Granted Jun 22, 1976·69 cites·14 claims
- 1692US5765883AAdjustable pressure relief latchHARTWELL CORP·Filed 1997·Granted Jun 16, 1998·99 cites·1 claims
- 1792US5754412ACircuit board standoff connectorHARTWELL CORP·Filed 1995·Granted May 19, 1998·108 cites·9 claims
- 1892US5213381ADraw latchHARTWELL CORP·Filed 1992·Granted May 25, 1993·87 cites·16 claims
- 1992US4786225AStand-off fastenerHARTWELL CORP·Filed 1988·Granted Nov 22, 1988·71 cites·2 claims
- 2091US11193305B2Lock apparatusHARTWELL CORP·Filed 2019·Granted Dec 7, 2021·6 cites·20 claims
- 2191US6866226B2Pressure responsive blowout latchHARTWELL CORP·Filed 2002·Granted Mar 15, 2005·58 cites·40 claims
- 2291US6279971B1Latch with sensorHARTWELL CORP·Filed 1999·Granted Aug 28, 2001·123 cites·10 claims
- 2391US4220364AFlush type latchesHARTWELL CORP·Filed 1978·Granted Sep 2, 1980·50 cites·2 claims
- 2491US4183564AExternally accessible adjuster for flush latchesHARTWELL CORP·Filed 1978·Granted Jan 15, 1980·57 cites·5 claims
- 2590US4502193AStand-off fastenerHARTWELL CORP·Filed 1981·Granted Mar 5, 1985·55 cites·8 claims
- 2689US9650807B2Tool operated channel latchHARTWELL CORP·Filed 2015·Granted May 16, 2017·9 cites·10 claims
- 2789US6325428B1Latch assembly including sensorHARTWELL CORP·Filed 1999·Granted Dec 4, 2001·70 cites·17 claims
- 2889US5820175ASelf-closing latchHARTWELL CORP·Filed 1996·Granted Oct 13, 1998·76 cites·13 claims
- 2988US6913297B2Rotary latch mechanismHARTWELL CORP·Filed 2003·Granted Jul 5, 2005·49 cites·39 claims
- 3088US4365831AChannel latchHARTWELL CORP·Filed 1980·Granted Dec 28, 1982·58 cites·10 claims
- 3186US7882941B2Viscous shear damping strut assemblyHARTWELL CORP·Filed 2007·Granted Feb 8, 2011·12 cites·19 claims
- 3286US7252311B2Motor driven latchHARTWELL CORP·Filed 2004·Granted Aug 7, 2007·40 cites·12 claims
- 3386US7185926B2Preloaded latch mechanismHARTWELL CORP·Filed 2005·Granted Mar 6, 2007·24 cites·21 claims
- 3486US5152559ALatching mechanismHARTWELL CORP·Filed 1989·Granted Oct 6, 1992·55 cites·16 claims
- 3586US4826221ATension and shear latching mechanismHARTWELL CORP·Filed 1987·Granted May 2, 1989·53 cites·13 claims
- 3685US4570290AHinge having a laterally outwardly extending flat springHARTWELL CORP·Filed 1984·Granted Feb 18, 1986·47 cites·10 claims
- 3785US4530529AExternally accessible adjuster for flush latchesHARTWELL CORP·Filed 1982·Granted Jul 23, 1985·47 cites·2 claims
- 3884US10443279B2Single link hook latchHARTWELL CORP·Filed 2016·Granted Oct 15, 2019·8 cites·20 claims
- 3983US11773622B2Key, lock, and latch assemblyHARTWELL CORP·Filed 2021·Granted Oct 3, 2023·1 cites·12 claims
- 4083US6382690B1Keeper mechanismHARTWELL CORP·Filed 2000·Granted May 7, 2002·33 cites·22 claims
- 4183US4455711AHinge having a laterally outwardly extending flat springHARTWELL CORP·Filed 1981·Granted Jun 26, 1984·43 cites·30 claims
- 4282US9580945B2Hold open rod locking sleeveHARTWELL CORP·Filed 2013·Granted Feb 28, 2017·7 cites·20 claims
- 4382US7578475B2Pressure responsive blowout latchHARTWELL CORP·Filed 2004·Granted Aug 25, 2009·35 cites·68 claims
- 4482US6866227B2Pressure responsive blowout latch with reservoirHARTWELL CORP·Filed 2003·Granted Mar 15, 2005·39 cites·20 claims
- 4582US4911486ATamper proof slide bolt locking apparatusHARTWELL CORP·Filed 1989·Granted Mar 27, 1990·42 cites·11 claims
- 4681US10670063B2Hold open rod locking mechanismHARTWELL CORP·Filed 2015·Granted Jun 2, 2020·6 cites·19 claims
- 4781US7255376B2Pressure sensing dead boltHARTWELL CORP·Filed 2002·Granted Aug 14, 2007·39 cites·38 claims
- 4881US4986576ALocking door latchHARTWELL CORP·Filed 1990·Granted Jan 22, 1991·50 cites·19 claims
- 4980US4099751APin latch structureHARTWELL CORP·Filed 1976·Granted Jul 11, 1978·33 cites·9 claims
- 5079USD1088806SAircraft latch lock keyHARTWELL CORP·Filed 2022·Granted Aug 19, 2025·0 cites·1 claims
Showing the top 50 of 116 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when HARTWELL CORP files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →