Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D265990 | Columnar loudspeaker | Peter Hartwein | 1982-08-31 |
| D265822 | Loudspeaker column | Peter Hartwein | 1982-08-17 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D265990 | Columnar loudspeaker | Peter Hartwein | 1982-08-31 |
| D265822 | Loudspeaker column | Peter Hartwein | 1982-08-17 |