J. Brian Caldwell
11Patents
6h-index
8Co-inventors
59Inventor score
Filing activity: Jun 9, 1987 → Jul 28, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8903232B1 | Optical attachment for reducing the focal length of an objective lens | Physics | 29 | Active |
| US8879901B2 | Optical attachment for reducing the focal length of an objective lens | Physics | 24 | Active |
| US5206189A | Sol-gel method for the preparation of monolithic multicomponent oxide glasses | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5182236A | Gradient index glasses and sol-gel method for their preparation | Chemistry; Metallurgy | 17 | Expired |
| US4902650A | Gradient-index glass | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4797376A | Sol-gel method for making gradient-index glass | Emerging Cross-Sectional Technologies | 14 | Expired |
| US8678676B2 | Tilt shift lens adapter | Physics | 6 | Active |
| US8169717B2 | Large aperture imaging optical systems | Physics | 4 | Active |
| US7733581B2 | Large aperture imaging optical system | Physics | 2 | Active |
| US7808718B2 | Afocal Galilean attachment lens with high pupil magnification | Physics | 2 | Active |
| US10126533B1 | Anamorphic optical system wity relative small squeeze ratio but with relatively pronounced residual anamorphic characteristics | Physics | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.