Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847485 | Arrangement for determining the number of persons and a direction within a space to be monitored or a pass-through | — | 1989-07-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847485 | Arrangement for determining the number of persons and a direction within a space to be monitored or a pass-through | — | 1989-07-11 |