Ernst Thielenhaus KG

Patent Owner

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B24B MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING 264
 
  
 
B24D TOOLS FOR GRINDING, BUFFING, OR SHARPENING 129

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5507684 Machine for the two-stage machining of preground shaftsAug 11, 94Apr 16, 96[B24B]
5319891 Method of and tool for fine-machining a part-spherical workpieceAug 10, 92Jun 14, 94[B24B, B24D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6173494 Method of making a valve seatExpiredJan 24, 00Jan 16, 01[B21D]
6098958 Valve assembly, especially for a fuel-injection valve and method of making sameExpiredMay 06, 98Aug 08, 00[F16K]
5947662 System for holding a thin-walled workpiece during machiningExpiredJul 31, 98Sep 07, 99[B23C]
5826866 System for holding a thin-walled workpiece during machiningExpiredFeb 03, 97Oct 27, 98[B25B]
5730647 Apparatus for fine-grinding a crankshaftExpiredMar 04, 97Mar 24, 98[B24B]
5679061 System for grinding rings with hydraulic holdingExpiredOct 18, 91Oct 21, 97[B42B]
5655952 System for honing camshaft camsExpiredJun 26, 95Aug 12, 97[B24B]
5634842 Apparatus for the precision grinding of conical seats for cylindrical nozzle workpiecesExpiredNov 08, 95Jun 03, 97[B24B]
5516325 System for honing camshaft camsExpiredJul 14, 94May 14, 96[B24B]
5507686 Brake-disk grindingExpiredAug 15, 94Apr 16, 96[B24B]
5472373 Disk-grinding apparatusExpiredAug 15, 94Dec 05, 95[B24B]
5174069 System for grinding rings with mechanical holdingExpiredOct 18, 91Dec 29, 92[B24B]
5148638 Apparatus for grinding an annular workpieceExpiredSep 24, 91Sep 22, 92[B24B]
5133155 Apparatus for grinding disk facesExpiredApr 27, 90Jul 28, 92[B24B]
5078570 Transport system for machining operationExpiredApr 02, 90Jan 07, 92[B65G]
5040338 Apparatus for the grinding of brake disksExpiredApr 06, 90Aug 20, 91[B24B]
4519170 Method of and apparatus for holding a shaft during finish grindingExpiredOct 28, 83May 28, 85[B24B]
4419845 Method of and apparatus for finish-grinding a camshaftExpiredMar 23, 81Dec 13, 83[B24B]

Top Inventors for This Owner

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