Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865955 | Recording elements comprising write-once thin film alloy layers | Yuan-Sheng Tyan, Fridrich Vazan | 1989-09-12 |
| 4812385 | Recording elements comprising write-once thin film alloy layers | Yuan-Sheng Tyan, Donald R. Preuss | 1989-03-14 |
| 4812386 | Recording elements comprising write-once thin film alloy layers | Yuan-Sheng Tyan, Salvatore J. Marino | 1989-03-14 |
| 4798785 | Recording elements comprising write-once thin film alloy layers | Yuan-Sheng Tyan, Fridrich Vazan | 1989-01-17 |
| 4797871 | Erasable optical recording method | Yuan-Sheng Tyan, Fridrich Vazan | 1989-01-10 |
| 4795695 | Recording elements comprising write-once thin film alloy layers | Yuan-Sheng Tyan, Salvatore J. Marino | 1989-01-03 |