Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5669839 | Method of metering a flowable lubricant of a chain drive | Walter Graf, Anton May | 1997-09-23 |
| 5634531 | Electrically powered automatic lubricant dispenser | Walter Graf | 1997-06-03 |