Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4541725 | Perpetual calendar mechanism comprising a four year cycle indicator | Louis Baumgartner | 1985-09-17 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4541725 | Perpetual calendar mechanism comprising a four year cycle indicator | Louis Baumgartner | 1985-09-17 |