Inventor

PIETRZYKOSKI ANTHONY

US2 patents

Patents

2 patents

US6160787ADec 12, 2000

Multiple layer optical recording medium for use with two different wavelength laser beams

WEA MFG INC84 citations89

US5315107AMay 24, 1994

Compact disc counter arranged to minimize counting errors having a pair of beams and a pulse counting means

WEA MFG INC23 citations86