P

Inventor

RATKOWSKI DONALD J

US12 patents
⚠️ This page may combine multiple inventors who share the name “RATKOWSKI DONALD J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

PARAGON OPTICAL INC

5 patents
US4661573AApr 28, 1987

Lens composition articles and method of manufacture

PARAGON OPTICAL INC72 citations95
US4769431ASep 6, 1988

Polyacryloxyalkylsilanol lens composition, articles and method of manufacture

PARAGON OPTICAL INC43 citations91
US4582884AApr 15, 1986

Lens composition, article and method of manufacture

PARAGON OPTICAL INC41 citations91
US4419505ADec 6, 1983

Contact lens composition, article and method of manufacture

PARAGON OPTICAL INC32 citations91
US4535138AAug 13, 1985

Silane ester contact lens composition, article and method of manufacture

PARAGON OPTICAL INC11 citations72

SOLA USA INC

2 patents
US5087392AFeb 11, 1992

Method of mold contact lenses

SOLA USA INC91 citations94
US4921205AMay 1, 1990

Lens mold assembly

SOLA USA INC98 citations91

RATKOWSKI DONALD J

2 patents
US4254065AMar 3, 1981

Injection molding of contact lenses

RATKOWSKI DONALD J66 citations93
USD1093538SSep 16, 2025

Pointed recoil spring guide for pistol

RATKOWSKI DONALD J0 citations60

PILKINGTON BARNES HIND INC

2 patents
US5505884AApr 9, 1996

Contact lenses and materials and methods of making same

PILKINGTON BARNES HIND INC45 citations91
US5519069AMay 21, 1996

Contact lenses and materials and methods of making same

PILKINGTON BARNES HIND INC12 citations72

PILKINGTON VISIONCARE INC

1 patent
US5170192ADec 8, 1992

Oxygen permeable bifocal contact lenses and their manufacture

PILKINGTON VISIONCARE INC53 citations93