Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4690524 | Multifocal spectacle lens having a large near-vision part | Erwin J. Daniels | 1987-09-01 |
| 4247179 | Multifocal spectacle lens | Erwin J. Daniels | 1981-01-27 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4690524 | Multifocal spectacle lens having a large near-vision part | Erwin J. Daniels | 1987-09-01 |
| 4247179 | Multifocal spectacle lens | Erwin J. Daniels | 1981-01-27 |