Inventor · disambiguated record
David A. Krohn
Also filed as: KROHN DAVID A · KROHN DAVID ARNOLD
29 granted patents·790 citations·filing 1974–2000
97Inventor score
Files withAMERICAN OPTICAL CORP14EOTEC CORP8MINNESOTA MINING & MFG3EXXON RESEARCH ENGINEERING CO23M FIBER OPTIC PRODUCTS INC1
Top patents by PatentIndex Score
29 records- 0197US4073579AOphthalmic lens with locally variable index of refraction and method of making sameAMERICAN OPTICAL CORP·Filed 1976·Granted Feb 14, 1978·104 cites·8 claims
- 0296US4042405AHigh strength ophthalmic lensAMERICAN OPTICAL CORP·Filed 1976·Granted Aug 16, 1977·93 cites·3 claims
- 0393US4277270AMethod of manufacture of optical fiberEOTEC CORP·Filed 1979·Granted Jul 7, 1981·46 cites·5 claims
- 0492US5381504AOptical fiber element having a permanent protective coating with a Shore D hardness value of 65 or moreMINNESOTA MINING & MFG·Filed 1993·Granted Jan 10, 1995·108 cites·38 claims
- 0586US4500870AMethod and components for remote reading of utility metersEOTEC CORP·Filed 1981·Granted Feb 19, 1985·47 cites·31 claims
- 0680US4012131AHigh strength ophthalmic lensAMERICAN OPTICAL CORP·Filed 1975·Granted Mar 15, 1977·33 cites·7 claims
- 0775US3996627AArtificial intraocular lensAMERICAN OPTICAL CORP·Filed 1975·Granted Dec 14, 1976·66 cites·10 claims
- 0874US6593913B1Method and system for selecting a displayed character using an input deviceJELLYVISION INC·Filed 2000·Granted Jul 15, 2003·38 cites·22 claims
- 0974US3935020AFaraday rotation glassesAMERICAN OPTICAL CORP·Filed 1974·Granted Jan 27, 1976·15 cites·5 claims
- 1068US4163654AMethod of manufacturing graded index optical fibersEXXON RESEARCH ENGINEERING CO·Filed 1978·Granted Aug 7, 1979·16 cites·1 claims
- 1167US4289516ALow loss optical fibersEOTEC CORP·Filed 1979·Granted Sep 15, 1981·20 cites·6 claims
- 1261US4036624AHeat treatment method for making photochromic gradient lensesAMERICAN OPTICAL CORP·Filed 1976·Granted Jul 19, 1977·14 cites·5 claims
- 1360US5221308ALow loss infrared transmitting hollow core optical fiber method of manufactureMINNESOTA MINING & MFG·Filed 1990·Granted Jun 22, 1993·22 cites·3 claims
- 1460US4277271AMethod of manufacturing graded index optical fibersEOTEC CORP·Filed 1979·Granted Jul 7, 1981·16 cites·10 claims
- 1559USRE36146EOptical fiber element having a permanent protective coating with a shore D hardness value of 65 or moreMINNESOTA MINING & MFG·Filed 1997·Granted Mar 16, 1999·19 cites·39 claims
- 1656US4606226ALiquid level sensorEOTEC CORP·Filed 1984·Granted Aug 19, 1986·14 cites·13 claims
- 1754US4679029AOptoelectronic rotational position sensorEOTEC CORP·Filed 1984·Granted Jul 7, 1987·12 cites·8 claims
- 1850US4080051APreparation of photochromic gradient lenses of cosmetically improved colorAMERICAN OPTICAL CORP·Filed 1976·Granted Mar 21, 1978·10 cites·4 claims
- 1949US3997249AIon exchangeable segment glassAMERICAN OPTICAL CORP·Filed 1975·Granted Dec 14, 1976·10 cites·4 claims
- 2047US4101302APhotochromic gradient lensesAMERICAN OPTICAL CORP·Filed 1977·Granted Jul 18, 1978·10 cites·5 claims
- 2145US4028082AMethod of making artificial intraocular lenses with holesAMERICAN OPTICAL CORP·Filed 1976·Granted Jun 7, 1977·9 cites·6 claims
- 2243US5073027AFiber optic displacement measuring apparatus3M FIBER OPTIC PRODUCTS INC·Filed 1989·Granted Dec 17, 1991·11 cites·5 claims
- 2343US4698616AOptoelectronic rotational position sensorEOTEC CORP·Filed 1986·Granted Oct 6, 1987·9 cites·6 claims
- 2443US4155734APreparation of photochromic gradient lensesAMERICAN OPTICAL CORP·Filed 1977·Granted May 22, 1979·15 cites·4 claims
- 2543US4076395APreparation of photochromic gradient lenses of improved colorAMERICAN OPTICAL CORP·Filed 1976·Granted Feb 28, 1978·5 cites·4 claims
- 2642US3997250AHigh strength ophthalmic lensAMERICAN OPTICAL CORP·Filed 1975·Granted Dec 14, 1976·8 cites·3 claims
- 2741US4703309APrecision optoelectronic rotational position sensorEOTEC CORP·Filed 1986·Granted Oct 27, 1987·6 cites·12 claims
- 2839US4273585ASealing glassEXXON RESEARCH ENGINEERING CO·Filed 1980·Granted Jun 16, 1981·6 cites·2 claims
- 2934US4015965AMethod of making artificial intraocular lenses with holesAMERICAN OPTICAL CORP·Filed 1975·Granted Apr 5, 1977·8 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →