Donald J. Ratkowski
12Patents
9h-index
6Co-inventors
65Inventor score
Filing activity: Apr 4, 1979 → Aug 15, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4921205A | Lens mold assembly | Emerging Cross-Sectional Technologies | 65 | Expired |
| US5087392A | Method of mold contact lenses | Chemistry; Metallurgy | 55 | Expired |
| US4254065A | Injection molding of contact lenses | Emerging Cross-Sectional Technologies | 39 | Expired |
| US4769431A | Polyacryloxyalkylsilanol lens composition, articles and method of manufacture | Physics | 36 | Expired |
| US4661573A | Lens composition articles and method of manufacture | Physics | 35 | Expired |
| US5170192A | Oxygen permeable bifocal contact lenses and their manufacture | Physics | 33 | Expired |
| US4582884A | Lens composition, article and method of manufacture | Physics | 31 | Expired |
| US5505884A | Contact lenses and materials and methods of making same | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4419505A | Contact lens composition, article and method of manufacture | Chemistry; Metallurgy | 20 | Expired |
| US5519069A | Contact lenses and materials and methods of making same | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4535138A | Silane ester contact lens composition, article and method of manufacture | Chemistry; Metallurgy | 6 | Expired |
| USD1093538S1 | Pointed recoil spring guide for pistol | General | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.