Patents per Year
Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4780383 | Optical storage system having expanded capacity | Lynn M. Reslewic, James A. Tshudy | 1988-10-25 | $13,743,000 |
| 4384094 | 3-Substituted- 7-dialkylamino-spiro(2H-1-benzopyran-2,3'-(3H)-naphtha(2,1-b)pyrans) | John E. Herweh, Alan B. Magnusson | 1983-05-17 | $7,275,000 |
| 4382134 | 3-Substituted-7-alkoxy-spiro(2H -1-benzopyran-2,3'-(3H)-naphtho(2,1-B)pyrans) | John E. Herweh, Alan B. Magnusson | 1983-05-03 | $6,351,000 |
| 4348508 | 3-Substituted-7-alkoxy-2,2'-Spirobi[2H-1-benzopyrans] | John E. Herweh, Alan B. Magnusson | 1982-09-07 | $1,509,000 |
| 4346186 | Process for fixing photo-induced colored derivatives of spiropyrans and compositions therefor | John E. Herweh, Alan B. Magnusson, Normal L. Miller | 1982-08-24 | $2,836,000 |
| 4342696 | 7-Dimethylamino-3-substituted-2,2'-spirobi[2H-1-benzopyrans] | John E. Herweh, Alan B. Magnusson | 1982-08-03 | $2,368,000 |