Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4852501 | Adjustable rack of shelves | Ralph Olson | 1989-08-01 |
| 4815394 | Adjustable rack of shelves | Ralph Ettlinger | 1989-03-28 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4852501 | Adjustable rack of shelves | Ralph Olson | 1989-08-01 |
| 4815394 | Adjustable rack of shelves | Ralph Ettlinger | 1989-03-28 |