Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5594993 | Hand-held builder's square and string line device incorporating a laser | ROBERT C TAGER, Herbert P. Radding | 1997-01-21 |
| 4182046 | Electronic level and protractor | Charles M. Rieker | 1980-01-08 |