Tech Stell Co., Ltd.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
 
 
0808 FASTENING, SUPPORTING OR MOUNTING DEVICES NOT INCLUDED IN OTHER CLASSES218
 
 
 
B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING 155
 
 
 
B21J FORGING; HAMMERING; PRESSING; RIVETING; FORGE FURNACES 119
 
 
 
F16B DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING 148

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7621168 Method for producing hexagonal washerJul 05, 06Nov 24, 09[B21J]
D576028 NutJul 24, 07Sep 02, 08[0808]
D575634 NutJun 15, 07Aug 26, 08[0808]
7331874 Method for producing circular washerJul 05, 06Feb 19, 08[B21D]
6776565 Structure of an anti-burglar screw boltSep 10, 02Aug 17, 04[F16B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2014/0186,134 Self-Locking Nut AssemblyAbandonedJan 03, 13Jul 03, 14[F16B]
2010/0303,580 UNLOCKING-RESISTANT AND LOOSENING-RESISTANT NUT ASSEMBLYAbandonedMay 27, 09Dec 02, 10[F16B]
7497652 Plastic fastening deviceExpiredFeb 23, 06Mar 03, 09[F16B]
2009/0003,960 Bolt and Washer Assembly Having Self-Locking and Burglarproof FunctionsAbandonedJun 26, 07Jan 01, 09[F16B]
2006/0216,129 Loose-proof screw boltAbandonedMar 24, 05Sep 28, 06[F16B]

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