Yoshimi Kohayakawa has been granted 57 US patents while listed as an inventor at Canon . The first was granted in 1980 and the most recent in June 2004. Yoshimi Kohayakawa ranks #42,642 of 4,157,543 US inventors in our database (top 1.0%). Patent records list Yoshimi Kohayakawa in Yokohama, JP.
Patents per Year Patents granted per year, 1980 to 2004 Bar chart with a peak of 7 patents in 1996. peak 7 1980: 2 patents 1980 1981: 3 patents 1983: 4 patents 1983 1984: 1 patents 1986: 2 patents 1986 1987: 3 patents 1988: 1 patents 1988 1989: 4 patents 1991: 2 patents 1991 1992: 2 patents 1993: 4 patents 1993 1994: 3 patents 1995: 2 patents 1995 1996: 7 patents 1997: 2 patents 1997 1998: 6 patents 1999: 3 patents 1999 2000: 2 patents 2001: 2 patents 2001 2004: 2 patents 2004 Issued Patents All Time
Showing 1–25 of 57 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
6757555 Ophthalmologic apparatus — 2004-06-29
$254,000
6685318 Ophthalmologic apparatus — 2004-02-03
$251,000
6309068 Eye examining apparatus — 2001-10-30
$141,000
6304723 Retinal camera — 2001-10-16
6131574 Ophthalmological apparatus — 2000-10-17
$186,000
6079830 Eye measuring apparatus having signal processing means for calculating eye information — 2000-06-27
$505,000
5995759 Stereoscopic image apparatus — 1999-11-30
$115,000
5903336 Eye examining apparatus having a driver for driving an eye examining system — 1999-05-11
$89,000
5889577 Optical apparatus or apparatus for detecting direction of line of sight, and various kinds of same apparatus using the same — 1999-03-30
$84,000
5847805 Scan imaging device for forming a stereoscopic image of the eye Kazuhiro Matsumoto 1998-12-08
$68,000
5825460 Visual function measuring apparatus — 1998-10-20
$60,000
5781275 Eye refractometer and eye refractive power measuring apparatus for electro-optically measuring the refractive power of the eye — 1998-07-14
$70,000
5777718 Eye refractometer — 1998-07-07
$48,000
5757463 Eye examining apparatus scanning the eye with a light beam — 1998-05-26
$42,000
5713047 Eye fundus photographing apparatus — 1998-01-27
$73,000
5675399 Ophthalmic apparatus — 1997-10-07
$110,000
5657116 Ocular lens measuring apparatus — 1997-08-12
$93,000
5585872 Ophthalmic measuring apparatus for determining the shape of the cornea of an eye — 1996-12-17
$31,000
5557321 Fundus camera or opthalmic apparatus comprising a flash light source system Takeshi Kitamura 1996-09-17
$47,000
5523809 Eye refraction measuring apparatus including optical path separating member light beam separating member, and/or light diameter changing means — 1996-06-04
$37,000
5523808 Ophthalmic apparatus having an intraocular pressure measuring system — 1996-06-04
$37,000
5506632 Ophthalmologic apparatus having an electrical magnifier — 1996-04-09
$86,000
5489978 Lens measuring apparatus Toshiaki Okumura 1996-02-06
$79,000
5483305 Eye examining apparatus — 1996-01-09
$37,000
5467151 Eye refractometer having variable wavelength illumination means — 1995-11-14
$37,000
