Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5853124 | Bottom seated pintle nozzle | William P. Johnson, Kresimir Gebert, Hoi Ching Wong | 1998-12-29 |
| 5823429 | Hybrid hydraulic electronic unit injector | Robert L. Barkhimer | 1998-10-20 |
| 5697346 | Method for using sonic gas-fueled internal combustion engine control system | — | 1997-12-16 |
| 5685273 | Method and apparatus for controlling fuel injection in an internal combustion engine | William P. Johnson, James A. Pena | 1997-11-11 |
| 5673673 | Method and apparatus for the high Mach injection of a gaseous fuel into an internal combustion engine | — | 1997-10-07 |
| 5641121 | Conversion of non-accumulator-type hydraulic electronic unit injector to accumulator-type hydraulic electronic unit injector | Robert L. Barkhimer | 1997-06-24 |
| 5553781 | Conversion of jerk type injector to accumulator type injector | Robert L. Barkhimer | 1996-09-10 |
| 5553575 | Lambda control by skip fire of unthrottled gas fueled engines | Kresimir Gebert, Hoi Ching Wong | 1996-09-10 |
| 5551391 | Accumulator fuel injection system | James A. Pena, Alan R. Roach, Bevan H. Johnston | 1996-09-03 |
| 5537972 | Fuel injection system having a pressure intensifier incorporating an overtravel safety feature | James A. Pena, Alan R. Roach, Bevan H. Johnston | 1996-07-23 |
| 5526786 | Dual fuel engine having governor controlled pilot fuel injection system | Robert L. Barkhimer, William E. Weseloh | 1996-06-18 |
| 5477830 | Electronic fuel injection system for internal combustion engines having a common intake port for each pair of cylinders | Robert L. Barkhimer, William P. Johnson | 1995-12-26 |
| 5467754 | Accumulator fuel injection system | James A. Pena, Alan R. Roach, Bevan H. Johnston | 1995-11-21 |
| 5450829 | Electronically controlled pilot fuel injection of compression ignition engines | — | 1995-09-19 |
| 5438968 | Two-cycle utility internal combustion engine | William P. Johnson, James A. Pena | 1995-08-08 |
| 5392745 | Expanding cloud fuel injecting system | — | 1995-02-28 |
| 5341783 | Accumulator fuel injection system | James A. Pena, Alan R. Roach, Bevan H. Johnston | 1994-08-30 |
| 5241935 | Accumulator fuel injection system | James A. Pena, Alan R. Roach, Bevan H. Johnston | 1993-09-07 |
| RE33270 | Pressure-controlled fuel injection for internal combustion engines | Michael A. Calkins, William E. Weseloh, Robert L. Barkhimer | 1990-07-24 |
| 4918923 | Internal combustion engine turbosystem and method | William E. Woollenweber | 1990-04-24 |
| 4885911 | Internal combustion engine turbosystem and method | William E. Woollenweber | 1989-12-12 |
| 4628881 | Pressure-controlled fuel injection for internal combustion engines | Michael A. Calkins, William E. Weseloh, Robert L. Barkhimer | 1986-12-16 |
| 4610267 | Fast response solenoid valve | Edward T. Gilbert, William E. Weseloh, Kenneth G. Rudolph | 1986-09-09 |