Issued Patents All Time
Showing 26–50 of 57 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5794599 | Method for checking the tightness of a tank system of a vehicle having an internal combustion engine | — | 1998-08-18 |
| 5765538 | Pump device for a fuel vapor retention system of an internal combustion engine | Erwin Krimmer, Helmut Denz, Wolfgang Schulz, Ernst Wild, Winfried Kuhnt +3 more | 1998-06-16 |
| 5741958 | Method for detecting and documenting exhaust-gas relevant malfunctions of a motor vehicle having an internal combustion engine with the aid of on-board means | Helmut Denz | 1998-04-21 |
| 5735252 | Method for pneumatically checking the operability of a tank-venting system | — | 1998-04-07 |
| 5730107 | Pump device for a fuel vapor trapping system, and fuel vapor trapping system | — | 1998-03-24 |
| 5666925 | Method and arrangement for diagnosing a tank-venting system | Helmut Denz, Ernst Wild, Georg Mallebrein | 1997-09-16 |
| 5604305 | Method for avoiding incorrect messages in the diagnosis of adjusting devices such as flow valves in motor vehicles | Helmut Denz | 1997-02-18 |
| 5553577 | Apparatus for checking the tightness of a tank venting system | Helmut Denz | 1996-09-10 |
| 5511529 | Tank-venting apparatus for a motor vehicle and method for operating the apparatus | Helmut Denz | 1996-04-30 |
| 5505182 | Method and arrangement for checking a tank-venting system | Helmut Denz | 1996-04-09 |
| 5476083 | Tank-venting apparatus as well as a method and an arrangement for checking the operability of a tank-venting valve | — | 1995-12-19 |
| 5463998 | Method and arrangement for checking the operability of a tank-venting system | Helmut Denz | 1995-11-07 |
| 5460142 | Method for venting a tank | Helmut Denz | 1995-10-24 |
| 5460141 | Method and apparatus for checking the tightness of a tank-venting system | Helmut Denz, Ernst Wild | 1995-10-24 |
| 5450833 | Breather for an internal combustion engine fuel tank | Helmut Denz, Hans Neu, Guenther Riehl, Rainer Frank | 1995-09-19 |
| 5442551 | Tank-venting system for a motor vehicle as well as a method and an arrangement for checking the operability thereof | Helmut Denz, Ernst Wild | 1995-08-15 |
| 5398661 | Method and arrangement for checking the operability of a tank-venting system | Helmut Denz | 1995-03-21 |
| 5383438 | Tank venting system for an internal combustion engine | — | 1995-01-24 |
| 5379638 | Method and device for detecting the fluid level in a tank | Helmut Denz | 1995-01-10 |
| 5373830 | Breather for an internal combustion engine fuel tank | Helmut Denz, Hans Neu, Guenther Riehl, Rainer Frank | 1994-12-20 |
| 5372117 | Method and arrangement for venting a tank | Helmut Denz, Ernst Wild | 1994-12-13 |
| 5361743 | Breather for an internal combustion engine fuel tank | Helmut Denz, Hans Neu, Guenther Riehl, Rainer Frank | 1994-11-08 |
| 5353771 | Method and arrangement for diagnosing a tank-venting system of a motor vehicle | Helmut Denz | 1994-10-11 |
| 5349935 | Tank-venting system and motor vehicle having the system as well as a method and an arrangement for checking the operability of the system | Manfred Mezger, Rainer Frank | 1994-09-27 |
| 5339788 | Method and arrangement for conducting a tank-venting diagnosis in a motor vehicle | Helmut Denz | 1994-08-23 |