Donald K. Mitchell
20Patents
10h-index
16Co-inventors
72Inventor score
Filing activity: Mar 4, 1974 → Feb 28, 2007
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5486923A | Apparatus for detecting relative movement wherein a detecting means is positioned in the region of natural interference | Physics | 57 | Expired |
| US5559600A | Apparatus for detecting relative movement | Physics | 47 | Expired |
| US5646730A | Relative movement detecting apparatus using a detector positioned in a region of natural interference | Physics | 29 | Expired |
| US3948200A | Jib sail system | Performing Operations; Transporting | 16 | Expired |
| US7193204B2 | Multi-track optical encoder employing beam divider | Physics | 15 | Expired |
| US5783752A | Diffuse surface interference position sensor | Physics | 14 | Expired |
| US4089060A | Digital logarithmic apparatus | Physics | 13 | Expired |
| US4059063A | Roll-furling mainsail | Performing Operations; Transporting | 12 | Expired |
| US5754295A | Non-contacting torque sensor and displacement measuring apparatus and method | Physics | 11 | Expired |
| US5022485A | Method and apparatus for detonation of distributed charges | Physics | 11 | Expired |
| US3938460A | Sail-raising system | Performing Operations; Transporting | 8 | Expired |
| US4991684A | Method and apparatus for detonation of distributed charges | Physics | 8 | Expired |
| US7324212B2 | Optical encoder having slanted optical detector elements for harmonic suppression | Physics | 7 | Active |
| US4026382A | Repetitive detonation seismic surveying method and apparatus | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7067797B1 | Optical position encoder having alignment indicators providing quantitative alignment indications | Physics | 5 | Expired |
| US3980865A | Electronic integrator for gas volume calculations | Physics | 4 | Expired |
| US4057023A | Halyard rig for roll-furling mainsail | Performing Operations; Transporting | 4 | Expired |
| US6686585B2 | Position encoder with scale calibration | Physics | 4 | Expired |
| US4030439A | Boom gooseneck fitting providing mainsail roller-furling | Performing Operations; Transporting | 3 | Expired |
| US7343693B2 | Scale assembly for optical encoder having affixed optical reference markers | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.