Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4529248 | Underbody cushioning and ventilating structure and general utility formed plastic sheet | Helen H. Trotman | 1985-07-16 |
| D278468 | Plastic sheet material or the like | Helen H. Trotman, by Peter M. Huber, legal representative | 1985-04-16 |
| D274108 | Seat cushion | Helen H. Trotman | 1984-06-05 |
| 4435015 | Underbody cushioning and ventilating structure and general utility formed plastic sheet | Helen H. Trotman | 1984-03-06 |
| D264401 | Seat cushion cover | Helen H. Trotman | 1982-05-18 |
| 4328993 | Body supporting and spacing structure | Helen H. Trotman | 1982-05-11 |
| 4313640 | Covered body supporting and spacing structure and removable cover therefor | Helen H. Trotman | 1982-02-02 |
| D262590 | Seat cushion | Helen H. Trotman | 1982-01-12 |
| 4205880 | Body supporting and spacing structure | Helen H. Trotman | 1980-06-03 |