Individual holder
HARTMANN DIRCK T
US·17 granted patents·694 citations·filing 1986–2008
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
17 records- 0197US4881750AATB shock absorberHARTMANN DIRCK T·Filed 1989·Granted Nov 21, 1989·135 cites·4 claims
- 0295US4826190ADual wheel driven tricycle with a fully enclosed multiple speed driveHARTMANN DIRCK T·Filed 1988·Granted May 2, 1989·97 cites·9 claims
- 0393US4815763AShock absorber for mountain bicyclesHARTMANN DIRCK T·Filed 1988·Granted Mar 28, 1989·87 cites·2 claims
- 0485US4721015AThree stage planetary driving wheel for pedal powered vehiclesHARTMANN DIRCK T·Filed 1986·Granted Jan 26, 1988·46 cites·5 claims
- 0581US4706982ADual range planetary transmission for pedal powered vehiclesHARTMANN DIRCK T·Filed 1986·Granted Nov 17, 1987·39 cites·7 claims
- 0680US4936597AFully enclosed multiple speed drive for a chain driven tandem bicycleHARTMANN DIRCK T·Filed 1989·Granted Jun 26, 1990·38 cites·7 claims
- 0780US4666172AMultiple speed planetary transmission for pedal-powered vehiclesHARTMANN DIRCK T·Filed 1986·Granted May 19, 1987·38 cites·6 claims
- 0879US7823898B2Multiple speed chainless drive for a utility tricycle with either torque amplifying pedal beams or a conventional bicycle seat and pedalsHARTMANN DIRCK T·Filed 2008·Granted Nov 2, 2010·8 cites·5 claims
- 0977US4716777AMultiple speed transmission for pedal powered vehiclesHARTMANN DIRCK T·Filed 1986·Granted Jan 5, 1988·27 cites·11 claims
- 1073US4955627AFive speed chainless drive for heavily loaded pedal powered tricyclesHARTMANN DIRCK T·Filed 1989·Granted Sep 11, 1990·28 cites·6 claims
- 1172US4986556AChainless motocross bicycleHARTMANN DIRCK T·Filed 1989·Granted Jan 22, 1991·27 cites·3 claims
- 1270US4702121AMultiple speed driving wheel for pedal powered vehiclesHARTMANN DIRCK T·Filed 1986·Granted Oct 27, 1987·22 cites·7 claims
- 1370US4694708ASingle speed transmission for pedal-propelled vehicleHARTMANN DIRCK T·Filed 1986·Granted Sep 22, 1987·25 cites·2 claims
- 1466US4842291AEnclosed multiple speed drive for low maintenance chain driven bicyclesHARTMANN DIRCK T·Filed 1987·Granted Jun 27, 1989·22 cites·4 claims
- 1565US4770433AMultiple speed drive for mountain bicyclesHARTMANN DIRCK T·Filed 1987·Granted Sep 13, 1988·22 cites·6 claims
- 1656US4715246AThree speed chainless planetary transmission for pedal-powered vehiclesHARTMANN DIRCK T·Filed 1986·Granted Dec 29, 1987·24 cites·4 claims
- 1740US5022478APower take-off for four wheel drive vehiclesHARTMANN DIRCK T·Filed 1990·Granted Jun 11, 1991·9 cites·2 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →