73721650
Apr 11, 1988
Mar 9, 1993
PHOTOMASKS, SCREEN MASKS, METAL MASKS OR CHROME MASKS USED FOR THE MANUFACTURE OF PRINTED CIRCUITS OR INTEGRATED CIRCUITS FOR THE ELECTRONICS INDUSTRY; GAS PLASMA BARGRAPH DISPLAY TUBES USED FOR MEASUREMENT APPARATUS SUCH AS PROCESS METERS, LEVEL INDICATORS, AUTOMOBILE METERS, ANALOG INDICATORS; SCREEN PRINTERS DESIGNED FOR PRECISION CIRCUITS AND THICK FILM INTEGRATED CIRCUITS, AND THERMAL PRINTER HEADS FOR SUCH PRINTERS; LASER LENGTH MEASURING APPARATUS AND METAL PHOTO ETCHING APPARATUS FOR THE MANUFACTURE OF PRINTED CIRCUITS OR INTEGRATED CIRCUITS FOR THE ELECTRONICS INDUSTRY
Electrical and Scientific Apparatus