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HUMPHREY INSTRUMENTS INC

Overview
  • Total Patents
    92
About

HUMPHREY INSTRUMENTS INC has a total of 92 patent applications. Its first patent ever was published in 1973. It filed its patents most often in United States, Japan and Germany. Its main competitors in its focus markets medical technology, optics and measurement are INDIGO DIABETES N V, MARSHALL IAN and NINGHUI TIANJIN TECH CO LTD.

Patent filings per year

Chart showing HUMPHREY INSTRUMENTS INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Humphrey William E 47
#2 Humphrey William Edwin 9
#3 Uiriamu Ii Hanfurii 8
#4 Campbell Charles E 6
#5 Lehmer Donald E 5
#6 Uiriamu Edouin Hanfurii 5
#7 Kirschbaum Alan R 3
#8 Turnbull Daniel H 2
#9 Shinn Alan L 2
#10 Sheedy Jamse E 2

Latest patents

Publication Filing date Title
US5491757A Field tester gaze tracking using content addressable memories to improve image data analysis speed
US5461436A Color field test with occlusion of non-tested eye
US5412854A Method of making a high frequency focused transducer
US5339151A Spectrometer for lensometer
US5303022A Lensometer with guided lens movement for progressive addition lens
US5323194A Perimeter with non spherical bowl
US4739410A Superimposed analog video image on plotted digital field tester display
US4675736A Superimposed analog video image on plotted digital field tester display
US4730910A Wide angle lens system having flare rejection properties
US4695831A Light pen having actuating accelerometer
US4732466A Fundus camera
JPS6129332A Ophthalmoscopic apparatus
JPS6129331A Ophthalmoscopic apparatus
US4560259A Objective refractor for the eye
US4669835A Objective refractor for the eye
US4707090A Objective refractor for the eye
US4650301A Objective refractor for the eye
US4607922A Method for aligning an eye examination instrument with the eye under examination
CA1172478A Objective refractor for the eye
CA1171707A Objective refractor for the eye