Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5051597 | Radiation dosage indicator | David F. Lewis, Carl A. Listl, Anthony Pilato, Robert D. Schenfele | 1991-09-24 | |
| 5002852 | Recording medium of improved stability | David F. Lewis, Steward E. Purdy | 1991-03-26 | |
| 4877198 | Device for grounding conductive film | Moshe Gershenson | 1989-10-31 | |
| 4784934 | Sensitivity of processless recording media | David F. Lewis, Steward E. Purdy | 1988-11-15 | $6,954,000 |
| 4734355 | Sensitivity of processless recording media | David F. Lewis, Steward E. Purdy | 1988-03-29 | $18,659,000 |
| 4732085 | Smoke generation apparatus and process using magnetic field | Moshe Gershenson | 1988-03-22 | $9,397,000 |
| 4684688 | UV stabilizer for polyacetylenic recording media | — | 1987-08-04 | $4,559,000 |
| 4668598 | Multicolor images using an electron beam | — | 1987-05-26 | $6,283,000 |