NAKANISHI DENTAL MFG. CO., LTD.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
A61C DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE 849
 
  
 
F03B MACHINES OR ENGINES FOR LIQUIDS 123
 
  
 
F16H GEARING199

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5617759 Mechanism for machining and grinding tool for converting rotational movement into reciprocating movementJun 12, 95Apr 08, 97[F16H]
5518398 Dental handpiece having rotatable contact memberAug 16, 94May 21, 96[A61C]
5423678 Handpiece having bearing protective memberMay 17, 94Jun 13, 95[A61C, F03B]
5407352 Transparent dental tube unitOct 04, 93Apr 18, 95[A61C]
5380201 Dental handpiece having cleaning unitOct 06, 93Jan 10, 95[A61C]
5286194 Dental handpiece having turbine rotatable in reverse directionNov 10, 92Feb 15, 94[A61C]
5252065 Cartridge type dental handpieceAug 07, 92Oct 12, 93[A61C]
5244384 Dental handpiece apparatus having heating unitAug 06, 92Sep 14, 93[A61C]
5037299 Chucking device for dental handpieceFeb 26, 91Aug 06, 91[A61C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5074789 Chucking device for dental handpieceExpiredSep 21, 90Dec 24, 91[A61C]
5011408 Chuck device for dental handpieceExpiredDec 22, 88Apr 30, 91[A61C]
4797098 Apparatus for dental treatment provided with check valve in fluid passageExpiredApr 22, 87Jan 10, 89[F27D]
4778387 Guide attachment for dental treatment tipExpiredFeb 26, 87Oct 18, 88[A61C]
4619614 Rotational coupling device for a dental handpiece having a built-in batteryExpiredAug 31, 84Oct 28, 86[A61C]
4595363 Dental handpiece having means for opening and closing a chuckExpiredAug 02, 84Jun 17, 86[A61C]
4578034 Dental handpiece having an optical fiberscopeExpiredAug 31, 84Mar 25, 86[A61C]
4533324 Air driven dental handpieceExpiredFeb 07, 84Aug 06, 85[A61C]
4493645 Device for opening and closing a chuck for a dental handpieceExpiredJun 30, 83Jan 15, 85[A61C]
4490113 Dental handpieceExpiredJan 26, 84Dec 25, 84[A61C]
4460341 Dental handpieceExpiredSep 23, 82Jul 17, 84[A61C]
4433957 Transmission gear for a dental handpieceExpiredFeb 22, 82Feb 28, 84[A61C]
4403956 Dental handpiece having an optical fiberscopeExpiredJul 13, 81Sep 13, 83[A61C]
4371341 Dental handpieceExpiredApr 13, 81Feb 01, 83[A61C]
4353697 Dental handpiece and a connecting means thereofExpiredJul 16, 80Oct 12, 82[A61C]
4202102 Device for opening and closing a chuck for a dental handpieceExpiredMay 12, 78May 13, 80[A61C]

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