Inventor
HACKSTOCK GERALD
US3 patents
Patents
3 patentsUS6454884B1Sep 24, 2002
Method of manufacturing a vehicle structural beam
PULLMAN IND INC39 citations89
US6286352B1Sep 11, 2001
Stretch roll forming apparatus using frusto-conical rolls
PULLMAN IND INC17 citations79
US6793743B2Sep 21, 2004
Vehicle structural beam and method of manufacture
PULLMAN IND INC9 citations71