Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4924157 | Motorized video projection screen control with digital interface | — | 1990-05-08 |
| 4571582 | Fault pre-warning device for use in carpet manufacturing machines | — | 1986-02-18 |
| 4568827 | Light barrier apparatus | — | 1986-02-04 |
| 4388528 | Photoelectronic apparatus | — | 1983-06-14 |
| 4365188 | Circuit arrangement for monitoring and controlling closing and opening movements | — | 1982-12-21 |
| 4354106 | Light barrier apparatus | — | 1982-10-12 |
| 4250498 | Light barrier receiver | — | 1981-02-10 |
| 4196961 | Optical apparatus for correcting the spherical aberration of a spherical concave mirror | Gunter Fetzer | 1980-04-08 |