Delphax Systems
47Patents
0Active
47Granted
35Portfolio score
Filing activity: May 24, 1982 → Jan 30, 1998
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5315324A | High precision charge imaging cartridge | Emerging Cross-Sectional Technologies | 93 | Expired |
| US5103263A | Powder transport, fusing and imaging apparatus | Emerging Cross-Sectional Technologies | 63 | Expired |
| US4718657A | Paper stacker | Performing Operations; Transporting | 52 | Expired |
| US5278588A | Electrographic printing device | Performing Operations; Transporting | 30 | Expired |
| US5200285A | System and method for forming multiply toned images | Physics | 29 | Expired |
| US5014076A | Printer with high frequency charge carrier generation | Physics | 25 | Expired |
| US4992807A | Gray scale printhead system | Electricity | 25 | Expired |
| US4779105A | Printer interface | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4448872A | Duplex imaging with pressure transfixing | Physics | 21 | Expired |
| US5012291A | Powder transport, fusing and imaging apparatus | Physics | 20 | Expired |
| US5003327A | Printer autocontrast control | Physics | 19 | Expired |
| US4841313A | RF driver and control | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4879571A | Duplex printing device | Physics | 17 | Expired |
| US5293537A | Image transport fusing system | Physics | 16 | Expired |
| US4619515A | Electrostatic printing apparatus and method | Physics | 16 | Expired |
| US4891656A | Print cartridge with non-divergent electrostatic field | Performing Operations; Transporting | 16 | Expired |
| US4494129A | Electrostatic printing apparatus | Performing Operations; Transporting | 15 | Expired |
| US4734722A | Ion generator structure | Electricity | 14 | Expired |
| US5113223A | Printer flash fusing system | Physics | 12 | Expired |
| US5006869A | Charged particle printer | Performing Operations; Transporting | 12 | Expired |
| US5166709A | Electron DC printer | Physics | 11 | Expired |
| US4692017A | Toner transfer apparatus | Physics | 11 | Expired |
| US4958172A | Charge transfer imaging cartridge | Physics | 10 | Expired |
| US4999653A | Venetian blinding | Electricity | 10 | Expired |
| US5239318A | Finger driver and printer | Performing Operations; Transporting | 10 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.