Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5256111 | Drive chain tensioner | Thomas Haak-Frendscho | 1993-10-26 |
| 5167191 | Gusseted mobile storage system | — | 1992-12-01 |
| 5082178 | Mobile shelving apparatus | James J. Slattery | 1992-01-21 |
| 5058507 | Carriage drive for mobile storage system with drive chain tensioner | — | 1991-10-22 |
| 5013101 | Anti-tip apparatus for mobile storage units | — | 1991-05-07 |
| 5007351 | Mobile carriage with center drive | — | 1991-04-16 |
| 4984737 | Mobile shelving apparatus | James J. Slattery | 1991-01-15 |
| 4809856 | Shelf divider | — | 1989-03-07 |
| 4738054 | Ceiling access door assembly | Otto E. Kersten, Gregory Kulpa | 1988-04-19 |
| 4733511 | Gravity closing fire-rated ceiling access door | — | 1988-03-29 |