Roger A. Fields
17Patents
6h-index
18Co-inventors
59Inventor score
Filing activity: Jan 13, 1986 → Feb 26, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5767945A | Methods of changing the visibility of some characteristic or information to be included in a hard copy of a recorded image | Physics | 103 | Expired |
| US5729768A | One-time use camera provided with frangible flash support destroyed by opening lighttight enclosure to remove exposed film | Physics | 33 | Expired |
| US4811042A | Method and apparatus for recording and using exposure data in a photographic system | Physics | 22 | Expired |
| US6505002B2 | Camera that displays predominant color multi-color scene and/or multi-color captured image of scene | Electricity | 21 | Expired |
| US4772910A | Full/fill flash control system for cameras | Physics | 13 | Expired |
| US6977669B2 | Preventing crease formation in donor web in dye transfer printer that can cause line artifact on print | Performing Operations; Transporting | 7 | Expired |
| US5317364A | Method and apparatus for reproducing an image recorded on a photographic filmstrip | Physics | 6 | Expired |
| US4655574A | Drop-in loading camera | Physics | 5 | Expired |
| US6456797B1 | Electronic flash unit with alternative capacitor switching | Physics | 5 | Expired |
| US6304722A | One-time use camera with film winding detection to enable exposure-related component | Physics | 3 | Expired |
| US4931819A | Film cassette and method of assembling the same | Physics | 2 | Expired |
| US6434338B1 | Camera with dual-function battery/manual operating button unit | Physics | 1 | Expired |
| US6385404B1 | Dual film image and electronic image capture camera capable of combining captured electronic images in a single multi-(index-) image | Electricity | 0 | Expired |
| US6366738B1 | Camera with print quantity designation for each exposure provides print cost total | Physics | 0 | Expired |
| US6408137B1 | Dual film image and electronic image capture camera capable of selecting film images to be combined in a single print | Physics | 0 | Expired |
| US6088529A | Method of unloading film cartridge from one-time-use camera | Physics | 0 | Expired |
| US6163650A | Camera with quietly operating manual film winder and anti-backup device | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.