Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5948494 | Composite sheet and sheet stack | — | 1999-09-07 |
| D337438 | Foldable easel | — | 1993-07-20 |
| D330221 | Display holder | — | 1992-10-13 |
| D328925 | Display stand | — | 1992-08-25 |
| 4579534 | Manually indexed adjustable focal length planetarium | Abby G. Lipman | 1986-04-01 |
| 4497582 | Planetarium alarm clock | Abby G. Lipman | 1985-02-05 |
| 4259671 | Antenna deicing apparatus | — | 1981-03-31 |