Wankel GmbH

Patent Applications and Registrations

Patent applications and USPTO patent grants for Wankel GmbH.The latest application filed is for "rotary piston blower having piston lobe portions shaped to avoid compression pockets".

Company Profile

0.21.0

Wankel GmbH - Berlin DE
Wankel GmbH - DE1 DE1
Wankel GmbH - Lindau DE
Wankel GmbH - DT DT
Wankel GmbH - Lindau Bodensee DT
Wankel G.m.b.H. - Lindau Bodensee DT

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Rotary piston blower having piston lobe portions shaped to avoid compression pockets Grant 5,039,289 - Eiermann , et al. August 13, 1	1991-08-13
Delivery valve of a rotary piston compressor Grant 4,943,217 - Nuber July 24, 1	1990-07-24
Rotary piston blower with foamed synthetic material surfaces running along roughened metal surfaces Grant 4,846,642 - Nuber , et al. July 11, 1	1989-07-11
Refrigerator compressor/internal combustion engine unit of the rotary piston type Grant 4,842,494 - Speiser June 27, 1	1989-06-27
Eccentric shaft of a rotary piston internal combustion engine Grant 4,793,778 - Eiermann December 27, 1	1988-12-27
External axial rotary piston blower with noise suppressing transfer ports Grant 4,781,541 - Sohler , et al. November 1, 1	1988-11-01
Rotary piston compressor with no negative torque Grant 4,218,199 - Eiermann August 19, 1	1980-08-19
Seal grid system for a rotary piston mechanism Grant 4,207,039 - Eiermann June 10, 1	1980-06-10
Delivery valve, especially for rotary piston compressors Grant 4,149,834 - Eiermann April 17, 1	1979-04-17
Heat pump unit Grant 4,127,364 - Eiermann , et al. November 28, 1	1978-11-28
Rotary piston compressor Grant 4,105,375 - Schindelhauer August 8, 1	1978-08-08
Inner seal for rotary piston engines and method of making same Grant 4,080,120 - Eiermann March 21, 1	1978-03-21
Method of making rotary piston engine cast iron interior seals by quench hardening Grant 4,025,366 - Ruf , et al. May 24, 1	1977-05-24
Method of manufacturing piston sealing strips of rotary piston machines Grant 4,016,635 - Leitermann , et al. April 12, 1	1977-04-12
Method of operating a compound supercharged rotary piston engine Grant 3,993,029 - Eiermann , et al. November 23, 1	1976-11-23
Housing for circular piston combustion engine of trochoid type and method of producing the same Grant 3,942,917 - Wieland March 9, 1	1976-03-09
Rotary combustion engine having improved ignition means Grant 3,941,097 - Seufer , et al. March 2, 1	1976-03-02
Lubricating system for rotary piston compressor Grant 3,912,044 - Schindelhauer October 14, 1	1975-10-14
Liquid Cooling System For Rotary Piston Engines Grant 3,743,452 - Steinwart July 3, 1	1973-07-03
Sealing Arrangement For Rotary Combustion Engine Grant 3,712,767 - Beutter January 23, 1	1973-01-23
Process For Producing A Wear-resistant Surface On A Workpiece Grant 3,640,799 - Stephan , et al. February 8, 1	1972-02-08

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