David S. Sprague
7Patents
7h-index
2Co-inventors
42Inventor score
Filing activity: Oct 25, 1993 → May 23, 1995
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5422816A | Portable personal navigation tracking system | Electricity | 311 | Expired |
| US5642285A | Outdoor movie camera GPS-position and time code data-logging for special effects production | Physics | 225 | Expired |
| US5661652A | Mobile network with automatic position reporting between member units | Electricity | 210 | Expired |
| US5450344A | GPS receivers with data ports for the uploading and downloading of absolute position information | Physics | 130 | Expired |
| US5422814A | Global position system receiver with map coordinate system outputs | Physics | 103 | Expired |
| US5479351A | Time-keeping system and method for synchronizing independent recordings of a live performance in post-recording editing | Physics | 74 | Expired |
| US5596500A | Map reading system for indicating a user's position on a published map with a global position system receiver and a database | Physics | 58 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.