Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D488083 | Fluid meter register cover | Helmut W. Hopfe | 2004-04-06 |
| 6708571 | Temperature compensated rotary meter | Helmut W. Hopfe | 2004-03-23 |
| D377597 | Vise jaw | — | 1997-01-28 |
| 4919305 | Fuel dispensing nozzle with built-in flow regulator | — | 1990-04-24 |
| 4899792 | Fueling nozzle providing combination breakaway and swivel coupling | — | 1990-02-13 |
| 4896705 | Containment manhole | Eric J. Butterfield | 1990-01-30 |
| 4770317 | Automatic overfill prevention system | Eric J. Butterfield | 1988-09-13 |
| 4763806 | Containment manhole | Eric J. Butterfield | 1988-08-16 |