Frederick R. Chamberlain, IV
15Patents
8h-index
16Co-inventors
69Inventor score
Filing activity: Mar 20, 1978 → Nov 19, 1998
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6106089A | Magnetic sensor for ink detection | Performing Operations; Transporting | 123 | Expired |
| US5689742A | Full frame annotation system for camera | Physics | 42 | Expired |
| US5714747A | Magnetic card and reader system | Physics | 30 | Expired |
| US6372338B1 | Spherical magnetic particles for magnetic recording media | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5762263A | Product container containing a magnetic identifier | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5610518A | Method and apparatus for detecting small magnetizable particles and flaws in nonmagnetic conductors | Physics | 13 | Expired |
| US5678102A | Dual purpose camera | Electricity | 12 | Expired |
| US5717381A | Copyright protection for photos and documents using magnetic elements | Physics | 8 | Expired |
| US5736722A | Dual sensor decoder | Physics | 6 | Expired |
| US4213684A | System for forming a quadrifid image comprising angularly related fields of view of a three dimensional object | Physics | 5 | Expired |
| US5565947A | Framing apparatus for a camera | Electricity | 5 | Expired |
| US6377755B1 | Thermally protective camera case | Physics | 5 | Expired |
| US5895134A | Advanced photo system format selector | Physics | 4 | Expired |
| US5633486A | Apparatus for sensing magnetic fields from a wide range of magnetic media | Physics | 3 | Expired |
| US5764054A | Contiguously matched magnetic sensor array and magnetic media for authentication of documents and products | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.