Philip M. Johnson
30Patents
13h-index
17Co-inventors
78Inventor score
Filing activity: Jul 29, 1974 → Nov 19, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD512797S1 | Protective face shield lens | General | 59 | Expired |
| USD503498S1 | Protective face shield assembly | General | 44 | Expired |
| US7007306B2 | Face shield assembly | Human Necessities | 33 | Expired |
| USD503422S1 | Silicone goggle | General | 28 | Expired |
| USD503497S1 | Protective face shield molded lens | General | 26 | Expired |
| USD512187S1 | Protective face shield assembly | General | 26 | Expired |
| USD504194S1 | Protective face shield lens | General | 23 | Expired |
| USD511227S1 | Protective face shield molded lens | General | 21 | Expired |
| US5226976A | Metal treatment | Chemistry; Metallurgy | 21 | Expired |
| US4023908A | Direction determining method and apparatus | Physics | 17 | Expired |
| USD533316S1 | Protective face shield lens | General | 15 | Expired |
| US5634979A | Composition and method for degreasing metal surfaces | Chemistry; Metallurgy | 13 | Expired |
| US5393447A | Composition and process for desmutting and deoxidizing without smutting | Chemistry; Metallurgy | 13 | Expired |
| US3970391A | Direction determining method and apparatus | Physics | 11 | Expired |
| US5401337A | Secondary protective treatments for metal surfaces | Chemistry; Metallurgy | 9 | Expired |
| US6001186A | Acid cleaning/deoxidizing aluminum and titanium without substantial etching | Chemistry; Metallurgy | 8 | Expired |
| US4100404A | Beam projector | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US4550059A | Method of forming a tintable abrasion-resistant coating on a substrate and article produced thereby | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6447665B1 | Faster two-step sealing of anodized aluminum surfaces | Chemistry; Metallurgy | 6 | Expired |
| US3988059A | Projector | Physics | 5 | Expired |
| US5637252A | Inhibitor for aqueous liquid deoxidizing composition and process for aluminum, with reduced etching of titanium | Chemistry; Metallurgy | 5 | Expired |
| US5720823A | Composition and process for desmutting and deoxidizing without smutting | Chemistry; Metallurgy | 4 | Expired |
| US10502593B1 | Linear and rotary multitrack absolute position encoder and methods using the same | Physics | 3 | Active |
| US10429183B2 | Non-contact coordinate measuring machine using hybrid cyclic binary code structured light | Physics | 2 | Active |
| US5410399A | Interpolative direction determining system | Mechanical Engineering; Lighting; Heating | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.