Ashai Optical Co., Ltd.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C01B NON-METALLIC ELEMENTS; COMPOUNDS THEREOF178
 
  
 
G02C SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES 148

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE37545 Auxiliary lenses for eyeglassesOct 21, 98Feb 12, 02[G02C]
5217699 Calcium-phosphate type hydroxyapatiteJul 17, 91Jun 08, 93[C01B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5082566 Calcium-phosphate type hydroxyapatite for chromatographic separation and process for producing sameExpiredSep 12, 88Jan 21, 92[C01B, B01D]
5037543 Assemblage of hydroxyl apatite particles and liquid chromatography column using the sameExpiredJul 09, 90Aug 06, 91[B01D]
5009472 Light scanning device with polarizing device to make light transmission more uniformExpiredDec 31, 87Apr 23, 91[G02B]
4876603 Signal processing device for automatic-focusing video signal in electronically controlled photographic cameraExpiredMar 25, 88Oct 24, 89[H04N]
4868377 Optical pickup for reading optical disk information provided with error detecting means by knife edge testExpiredFeb 02, 88Sep 19, 89[G01J, G04B]
4865733 Cell separator deviceExpiredMar 20, 87Sep 12, 89[B01D]
4855772 Electronically controlled cameraExpiredMar 25, 88Aug 08, 89[G03B]
4855782 Display device for indicating the setting of a zoom lensExpiredApr 12, 88Aug 08, 89[G03B]
4794171 Calcium-phosphate type hydroxyapatite and process for producing sameExpiredSep 22, 86Dec 27, 88[C01B]
4781904 Calcium-phosphate type hydroxyapatite for chromatographic separation and process for producing sameExpiredSep 22, 86Nov 01, 88[C01B]
4678910 Reference position-detecting device for photoelectric encoderExpiredMar 08, 85Jul 07, 87[G01D]
4600278 Lens capExpiredMar 08, 85Jul 15, 86[G02B]
4590248 Method for producing a plastic lens using tertiary alkyl peroxy allyl carbonateExpiredMar 23, 83May 20, 86[C08F]
4550987 Small size telephoto lensExpiredMay 06, 83Nov 05, 85[G02B]
4455723 Removable coupling device between a photographic camera and an accessoryExpiredJun 23, 81Jun 26, 84[F16B, A44B]

Top Inventors for This Owner

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