Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4850423 | Air preheater water jet cleaning apparatus | Alan J. Pitts, Don M. Roberts, Randall B. Cogbill | 1989-07-25 |
| 4846769 | Mechanical fuse for reciprocating roller chain | — | 1989-07-11 |