Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4365903 | Lockable key with luminescent display for office typewriters and teleprinters | Karl Zeller | 1982-12-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4365903 | Lockable key with luminescent display for office typewriters and teleprinters | Karl Zeller | 1982-12-28 |