John C. Walker
19Patents
11h-index
15Co-inventors
69Inventor score
Filing activity: Aug 26, 1983 → Aug 5, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5674173A | Apparatus for separating particles | Performing Operations; Transporting | 190 | Expired |
| US5951877A | Particle filter method | Performing Operations; Transporting | 81 | Expired |
| US5906570A | Particle filter apparatus | Performing Operations; Transporting | 76 | Expired |
| US5913768A | Particle filter apparatus | Performing Operations; Transporting | 75 | Expired |
| US5722926A | Method for separating particles | Performing Operations; Transporting | 69 | Expired |
| US6773552B1 | Method of selecting and/or processing wood according to fibre characteristics | Physics | 55 | Expired |
| US4991743A | Controlled flow accumulator | Human Necessities | 45 | Expired |
| US4477827A | Lead frame for leaded semiconductor chip carriers | Electricity | 38 | Expired |
| US5001060A | Plant anaerobic regulatory element | Chemistry; Metallurgy | 32 | Expired |
| US5656057A | Method for drying and sintering an optical fiber preform | Chemistry; Metallurgy | 13 | Expired |
| US5633130A | Buffer system for increasing seroconversion efficiency | Human Necessities | 11 | Expired |
| US5731426A | Phaseolus .alpha.-D-galactosidases | Human Necessities | 10 | Expired |
| US5606042A | Glycine .alpha.-D-galactosidases | Human Necessities | 9 | Expired |
| US6184017A | Glycine and phaseolus .alpha.-D-galactosidases | Chemistry; Metallurgy | 9 | Expired |
| US5610063A | cDNA for .alpha.-N-acetyl-galactosaminidase from Gallus domesticus | Chemistry; Metallurgy | 3 | Expired |
| US5064001A | Rotary soil working tool | Emerging Cross-Sectional Technologies | 2 | Expired |
| US7601886B2 | Production of transgenic plants with increased seed yield | Emerging Cross-Sectional Technologies | 0 | Expired |
| US6630339B1 | Glycine and phaseolus &agr;-D-galactosidases | Chemistry; Metallurgy | 0 | Expired |
| US6822183B2 | Method of selecting wood for chemical pulping | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.