Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4698534 | Quiet by-pass vacuum motor | Robert L. Hyatt, Leonard J. Kline, Jr. | 1987-10-06 |
| 4621991 | Quiet by-pass vacuum motor | Robert L. Hyatt, Leonard J. Kline, Jr. | 1986-11-11 |
| 4432169 | Glass ware etching apparatus | James Schultz, Ralph J. Jurecki | 1984-02-21 |