John E. Freeman
13Patents
9h-index
17Co-inventors
69Inventor score
Filing activity: Sep 17, 1979 → Dec 13, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4422508A | Methods for pulling sucker rod strings | Fixed Constructions | 78 | Expired |
| US6428713B1 | MEMS sensor structure and microfabrication process therefor | Performing Operations; Transporting | 58 | Expired |
| US4360288A | Fiberglass sucker rod construction | Emerging Cross-Sectional Technologies | 40 | Expired |
| US4939037A | Composite sign post | Emerging Cross-Sectional Technologies | 35 | Expired |
| US6750152B1 | Method and apparatus for electrically testing and characterizing formation of microelectric features | Electricity | 35 | Expired |
| US5936022A | Compositions and methods for a high performance protective coating | Chemistry; Metallurgy | 21 | Expired |
| US4475404A | Pull tester | Physics | 14 | Expired |
| US6829814B1 | Process of making an all-silicon microphone | Emerging Cross-Sectional Technologies | 14 | Expired |
| US7134179B2 | Process of forming a capacitative audio transducer | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4789567A | Abrasion resistant coating and method of application | Performing Operations; Transporting | 7 | Expired |
| US4968538A | Abrasion resistant coating and method of application | Performing Operations; Transporting | 5 | Expired |
| US5969078A | Compositions and methods for a protective surface coating useful to repair damaged surfaces | Chemistry; Metallurgy | 4 | Expired |
| US4767291A | Single valve pump | Emerging Cross-Sectional Technologies | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.