Inventor · disambiguated record
Mark A. Popjoy
Also filed as: POPJOY MARK · POPJOY MARK A · POPJOY MARK ALEXANDER
8 granted patents·163 citations·filing 1989–2009
88Inventor score
Top patents by PatentIndex Score
8 records- 0185US6698729B2Gas spring having a controllable output forceFiled 2001·Granted Mar 2, 2004·32 cites·13 claims
- 0285US6047797AEmergency locking gas springFICHTEL & SACHS IND INC·Filed 1997·Granted Apr 11, 2000·44 cites·3 claims
- 0378US5404972ASelf-blocking gas spring with temperature-responsive bypass valveFICHTEL & SACHS IND INC·Filed 1994·Granted Apr 11, 1995·43 cites·4 claims
- 0468US8079310B2Vertical position compensating device for a vehiclePOPJOY MARK ALEXANDER·Filed 2009·Granted Dec 20, 2011·6 cites·48 claims
- 0546US6145638AAdjustable installation with a controlled locking gas spring and an emergency locking gas springFICHTEL & SACHS IND INC·Filed 1999·Granted Nov 14, 2000·9 cites·3 claims
- 0645US6206153B1Adjustable installation with a controlled locking gas spring and an emergency locking gas springFICHTEL & SACHS IND INC·Filed 1999·Granted Mar 27, 2001·8 cites·18 claims
- 0739US6092632AGas spring with temperature compensationFICHTEL & SACHS IND INC·Filed 1997·Granted Jul 25, 2000·11 cites·12 claims
- 0838US4989700AGas spring with an anti-rattle piston assemblyFICHTEL & SACHS IND INC·Filed 1989·Granted Feb 5, 1991·10 cites·5 claims
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