CHANG, TONY

Patent Owner

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
 
 
E05B LOCKS; ACCESSORIES THEREFOR; HANDCUFFS149

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5077992 Door lock set with simultaneously retractable deadbolt and latchMay 28, 91Jan 07, 92[E05B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5046772 Door handle means suitable for mounting slim lever handleExpiredOct 02, 90Sep 10, 91[E05B]
5020836 Easily openable tubular latchExpiredNov 28, 90Jun 04, 91[E05C]

Top Inventors for This Owner

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