Robert Wilhelm Schumann
16Patents
9h-index
24Co-inventors
72Inventor score
Filing activity: Jul 7, 1975 → Apr 9, 2007
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6285774A | System and methodology for tracing to a source of unauthorized copying of prerecorded proprietary material, such as movies | Electricity | 235 | Expired |
| US7162642B2 | Digital content distribution system and method | Electricity | 144 | Expired |
| US6240401A | System and method for movie transaction processing | Physics | 141 | Expired |
| US6078328A | Compressed video graphics system and methodology | Physics | 63 | Expired |
| US6950532B1 | Visual copyright protection | Electricity | 42 | Expired |
| US4142146A | Digital apparatus for waveform measurement | Physics | 31 | Expired |
| US7698570B2 | Digital content distribution system and method | Electricity | 31 | Active |
| US7218754B2 | Visual copyright protection | Electricity | 30 | Expired |
| US6923367B1 | Safety mailbox | Human Necessities | 27 | Expired |
| US7277544B1 | Local content security system | Electricity | 8 | Expired |
| US4500182A | Photoplotter | Physics | 8 | Expired |
| US6538969B1 | System and method for implementing open and closed file systems on a storage medium | Physics | 7 | Expired |
| US7668503B1 | Secure remote repeater | Physics | 4 | Active |
| US7346185B2 | Optical content modulation for visual copyright protection | Electricity | 4 | Active |
| US4999791A | Computer graphics color film recording method and apparatus | Electricity | 2 | Expired |
| US7730313B2 | Tracing content usage | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.