Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858329 | A surveying and mapping apparatus for indicating the level differences of the ground travelled in relation to the distance travelled | — | 1989-08-22 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858329 | A surveying and mapping apparatus for indicating the level differences of the ground travelled in relation to the distance travelled | — | 1989-08-22 |