Inventor · disambiguated record
Donald J. Ratkowski
Also filed as: RATKOWSKI DONALD J
12 granted patents·564 citations·filing 1979–2022
93Inventor score
Files withPARAGON OPTICAL INC5PILKINGTON BARNES HIND INC2RATKOWSKI DONALD J2SOLA USA INC2PILKINGTON VISIONCARE INC1
Top patents by PatentIndex Score
12 records- 0192US4254065AInjection molding of contact lensesRATKOWSKI DONALD J·Filed 1979·Granted Mar 3, 1981·66 cites·4 claims
- 0291US5087392AMethod of mold contact lensesSOLA USA INC·Filed 1990·Granted Feb 11, 1992·91 cites·12 claims
- 0390US4921205ALens mold assemblySOLA USA INC·Filed 1988·Granted May 1, 1990·98 cites·22 claims
- 0488US4661573ALens composition articles and method of manufacturePARAGON OPTICAL INC·Filed 1986·Granted Apr 28, 1987·72 cites·33 claims
- 0583US5505884AContact lenses and materials and methods of making samePILKINGTON BARNES HIND INC·Filed 1995·Granted Apr 9, 1996·45 cites·21 claims
- 0682US4582884ALens composition, article and method of manufacturePARAGON OPTICAL INC·Filed 1984·Granted Apr 15, 1986·41 cites·25 claims
- 0779US4769431APolyacryloxyalkylsilanol lens composition, articles and method of manufacturePARAGON OPTICAL INC·Filed 1986·Granted Sep 6, 1988·43 cites·16 claims
- 0877US4419505AContact lens composition, article and method of manufacturePARAGON OPTICAL INC·Filed 1982·Granted Dec 6, 1983·32 cites·4 claims
- 0973US5170192AOxygen permeable bifocal contact lenses and their manufacturePILKINGTON VISIONCARE INC·Filed 1990·Granted Dec 8, 1992·53 cites·30 claims
- 1059US4535138ASilane ester contact lens composition, article and method of manufacturePARAGON OPTICAL INC·Filed 1982·Granted Aug 13, 1985·11 cites·8 claims
- 1146US5519069AContact lenses and materials and methods of making samePILKINGTON BARNES HIND INC·Filed 1995·Granted May 21, 1996·12 cites·16 claims
- 1229USD1093538SPointed recoil spring guide for pistolRATKOWSKI DONALD J·Filed 2022·Granted Sep 16, 2025·0 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →