H&S MACHINE AND SUPPLY CO., INC., PO BOX 1096, CORAPOLIS, PA. 15108, A CORP. OF PA.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5147151 Washer insert for bearing plateExpiredAug 23, 91Sep 15, 92[E21D]
5076734 Roof bolt with paddle resin mixer and method for making the sameExpiredOct 05, 90Dec 31, 91[E21D]
5042961 Roof bolt with helical coil and bail anchorExpiredJun 15, 89Aug 27, 91[E21D]
4984938 Coated washer for an anchor bolt systemExpiredSep 28, 89Jan 15, 91[E21D]
4704053 Versatile roof bolt assemblyExpiredFeb 03, 86Nov 03, 87[E21D]
4679967 Truss bracketExpiredJul 25, 85Jul 14, 87[E21D]
4655645 Method and apparatus for anchoring roof boltsExpiredDec 31, 84Apr 07, 87[E21D]

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