Durst (U.K.) Limited
6Patents
0Active
6Granted
22Portfolio score
Filing activity: Apr 8, 1977 → Apr 27, 1983
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4479713A | Photographic exposure masks | Physics | 4 | Expired |
| US4132478A | Illumination system for a photographic copying apparatus | Physics | 2 | Expired |
| US4400084A | Photographic exposure masks | Physics | 0 | Expired |
| US4239378A | Photographic printing apparatus | Physics | 0 | Expired |
| US4239382A | Photographic printing or enlarging apparatus | Physics | 0 | Expired |
| US4197001A | Photographic processing apparatus with variable sized tanks lined with bag-like plastic tank interiors | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.