Robert A. Clark
59Patents
10h-index
57Co-inventors
81Inventor score
Filing activity: Nov 8, 1974 → Mar 9, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3995444A | Organ perfusion system | Emerging Cross-Sectional Technologies | 136 | Expired |
| US8757479B2 | Method and system for creating personalized packaging | Performing Operations; Transporting | 72 | Active |
| US4731818A | Self-computing credit card telephone paystation method and system | Electricity | 48 | Expired |
| US4672661A | Credit card telephone station | Electricity | 41 | Expired |
| US5557751A | Method and apparatus for serial data communications using FIFO buffers | Physics | 38 | Expired |
| US6131757A | Collapsible box | Performing Operations; Transporting | 21 | Expired |
| US6669187B1 | Rear jet air knife | Performing Operations; Transporting | 18 | Expired |
| US5363747A | Processing vessel having discharge metering/mixing auger | Performing Operations; Transporting | 17 | Expired |
| US4136262A | Telephone paystation | Electricity | 14 | Expired |
| US7258340B2 | Sheet registration within a media inverter | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6581456B1 | Substrate bending stiffness measurement method and system | Physics | 10 | Expired |
| US6116043A | Food processing apparatus | Human Necessities | 9 | Expired |
| US7588245B2 | Friction retard sheet feeder | Performing Operations; Transporting | 8 | Active |
| US7559549B2 | Media feeder feed rate | Performing Operations; Transporting | 7 | Active |
| US10076869B2 | Electrostatic 3-D printer using leveling material and mechanical planer | Emerging Cross-Sectional Technologies | 6 | Active |
| US10180649B2 | Systems and methods for implementing electrophotographic layered manufacturing of three dimensional (3D) objects, parts and components using tri-level electrophotography | Physics | 6 | Active |
| US7913995B2 | Method and apparatus for non-contact measurement of a media stack in an image production device | Performing Operations; Transporting | 6 | Active |
| US4638121A | Telephone pay station | Electricity | 6 | Expired |
| US7746524B2 | Bi-directional inverter printing apparatus and method | Electricity | 4 | Active |
| US6772628B2 | Substrate bending stiffness measurement method and system | Physics | 4 | Expired |
| US8831503B2 | Creasing apparatus having rotating base with recess | Performing Operations; Transporting | 3 | Active |
| US6748801B2 | Substrate bending stiffness measurement method and system | Physics | 3 | Expired |
| US8826787B2 | Cutting machine media feeder system with fixed in-feed and out-feed trays | Emerging Cross-Sectional Technologies | 3 | Active |
| US7934718B2 | Sheet feeding of faster rate printing systems with plural slower rate sheet feeders | Performing Operations; Transporting | 3 | Active |
| US8042799B2 | Vacuum level switch for a vacuum corrugated feeder | Performing Operations; Transporting | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.