David E. Espenlaub
9Patents
3h-index
11Co-inventors
54Inventor score
Filing activity: Dec 19, 1983 → Jul 22, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7864991B2 | System and method for assisting a visually impaired individual | Physics | 45 | Active |
| US4635187A | Control for a multiprocessing system program process | Physics | 34 | Expired |
| US8000261B2 | System and method for multicast transmission | Electricity | 12 | Active |
| US8300553B2 | System and method for multicast transmission | Electricity | 3 | Active |
| US6574327B2 | Apparatus and method of processing local number portability calls in a signal transfer point of a telecommunications network | Electricity | 2 | Expired |
| US8429752B2 | System and method for digital rights management of digital media | Electricity | 2 | Active |
| US8787205B2 | System and method for multicast transmission | Electricity | 1 | Active |
| US9143333B2 | System and method for multicast transmission | Electricity | 0 | Active |
| US8763146B2 | System and method for digital rights management of digital media | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.