Assignee
HOOGLAND JAN
US5 patents
Top patents by PatentIndex Score
US4993817AFeb 19, 1991
Endoscope relay optics
HOOGLAND JAN54 citations92
US4946267AAug 7, 1990
Endoscope relay optics
HOOGLAND JAN41 citations92
US4575195AMar 11, 1986
Flat field lenses
HOOGLAND JAN59 citations92
US4545652AOct 8, 1985
Flat field lenses
HOOGLAND JAN41 citations92
US10537241B1Jan 21, 2020
Subjective optometer for home use
HOOGLAND JAN1 citations62