Peter L. Duffield
10Patents
8h-index
7Co-inventors
65Inventor score
Filing activity: Aug 4, 1972 → Apr 22, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4432005A | Ink control system for ink jet printer | Performing Operations; Transporting | 108 | Expired |
| US4914522A | Reproduction and enlarging imaging system and method using a pulse-width modulated air stream | Performing Operations; Transporting | 49 | Expired |
| US6081281A | Spray head for a computer-controlled automatic image reproduction system | Performing Operations; Transporting | 29 | Expired |
| US4999651A | Multi-color recorder with plural ink jets and reservoirs co-mounted on a reciprocating carriage, each reservoir containing a sub-reservoir in communication with an ink supply conduit | Performing Operations; Transporting | 21 | Expired |
| US3970222A | Apparatus and method for initiating formation of a filament of coating liquid | Textiles; Paper | 19 | Expired |
| US5434604A | Spray-painting system with automatic color calibration | Electricity | 18 | Expired |
| US3936135A | Catching apparatus and method for jet drop recording | Performing Operations; Transporting | 14 | Expired |
| US5828388A | Spray head for a computer-controlled automatic image reproduction system | General | 8 | Revoked |
| US4625373A | Method of making a printing head for an ink jet printer | Emerging Cross-Sectional Technologies | 7 | Expired |
| US7077528B1 | Digital projection display system with external light source | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.