Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4763977 | Optical fiber coupler with tunable coupling ratio and method of making | Brian S. Kawasaki, Masao Kawachi, Derwyn C. Johnson | 1988-08-16 |
| 4474427 | Optical fiber reflective filter | Brian S. Kawasaki, Derwyn C. Johnson, Yoshimasa Fujii | 1984-10-02 |
| 4457581 | Passive fiber optic data bus configurations | Derwyn C. Johnson, Brian S. Kawasaki | 1984-07-03 |
| 4330170 | Low-loss star couplers for optical fiber systems | Derwyn C. Johnson, Brian S. Kawasaki | 1982-05-18 |
| 4291940 | Low loss access coupler for multimode optical fiber distribution systems | Brian S. Kawasaki, Derwyn C. Johnson | 1981-09-29 |