Inventor

RISEN JR CARL W

US3 patents

Patents

3 patents

US6668941B2Dec 30, 2003

Screw holding and driving device

CREDO TECH CORP77 citations96

US6652203B1Nov 25, 2003

Precision drill bits

CREDO TECH CORP95 citations93

US6758639B2Jul 6, 2004

Bit for cutting drywall

CREDO TECH CORP9 citations69