Inventor
KROHN DAVID A
28 patents
⚠️ This page may combine multiple inventors who share the name “KROHN DAVID A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AMERICAN OPTICAL CORP
14 patentsUS4073579AFeb 14, 1978
Ophthalmic lens with locally variable index of refraction and method of making same
AMERICAN OPTICAL CORP104 citations96
US4042405AAug 16, 1977
High strength ophthalmic lens
AMERICAN OPTICAL CORP93 citations95
US3996627ADec 14, 1976
Artificial intraocular lens
AMERICAN OPTICAL CORP66 citations95
US4012131AMar 15, 1977
High strength ophthalmic lens
AMERICAN OPTICAL CORP33 citations92
US4155734AMay 22, 1979
Preparation of photochromic gradient lenses
AMERICAN OPTICAL CORP15 citations74
US4101302AJul 18, 1978
Photochromic gradient lenses
AMERICAN OPTICAL CORP10 citations74
US4080051AMar 21, 1978
Preparation of photochromic gradient lenses of cosmetically improved color
AMERICAN OPTICAL CORP10 citations74
US4036624AJul 19, 1977
Heat treatment method for making photochromic gradient lenses
AMERICAN OPTICAL CORP14 citations74
US4028082AJun 7, 1977
Method of making artificial intraocular lenses with holes
AMERICAN OPTICAL CORP9 citations74
US4015965AApr 5, 1977
Method of making artificial intraocular lenses with holes
AMERICAN OPTICAL CORP8 citations74
US3997249ADec 14, 1976
Ion exchangeable segment glass
AMERICAN OPTICAL CORP10 citations73
US3997250ADec 14, 1976
High strength ophthalmic lens
AMERICAN OPTICAL CORP8 citations73
US3935020AJan 27, 1976
Faraday rotation glasses
AMERICAN OPTICAL CORP15 citations73
US4076395AFeb 28, 1978
Preparation of photochromic gradient lenses of improved color
AMERICAN OPTICAL CORP5 citations63
EOTEC CORP
8 patentsUS4277270AJul 7, 1981
Method of manufacture of optical fiber
EOTEC CORP46 citations92
US4500870AFeb 19, 1985
Method and components for remote reading of utility meters
EOTEC CORP47 citations88
US4289516ASep 15, 1981
Low loss optical fibers
EOTEC CORP20 citations82
US4606226AAug 19, 1986
Liquid level sensor
EOTEC CORP14 citations74
US4277271AJul 7, 1981
Method of manufacturing graded index optical fibers
EOTEC CORP16 citations74
US4698616AOct 6, 1987
Optoelectronic rotational position sensor
EOTEC CORP9 citations69
US4679029AJul 7, 1987
Optoelectronic rotational position sensor
EOTEC CORP12 citations69
US4703309AOct 27, 1987
Precision optoelectronic rotational position sensor
EOTEC CORP6 citations63