Inventor
ROACH WILLIAM R
17 patents
⚠️ This page may combine multiple inventors who share the name “ROACH WILLIAM R”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RCA CORP
10 patentsUS4308337ADec 29, 1981
Uniform light exposure of positive photoresist for replicating spiral groove in plastic substrate
RCA CORP47 citations91
US4726659AFeb 23, 1988
Display device having different alignment layers
RCA CORP49 citations90
US4236823ADec 2, 1980
Diffractometer for measuring signal depth and width
RCA CORP20 citations82
US4180830ADec 25, 1979
Depth estimation system using diffractive effects of the grooves and signal elements in the grooves
RCA CORP29 citations82
US4155098AMay 15, 1979
Groove depth estimation system using diffractive groove effects
RCA CORP19 citations82
US4363118ADec 7, 1982
Sound carrier amplitude measurement system
RCA CORP16 citations74
US4352564AOct 5, 1982
Missing order defect detection apparatus
RCA CORP14 citations73
US4329575AMay 11, 1982
Video disc having a label for identifying material recorded thereon
RCA CORP19 citations73
US4306013ADec 15, 1981
Asymmetrical radiation exposure of spin coated photoresist to obtain uniform thickness coating used to replicate spiral grooves in plastic substrate
RCA CORP17 citations67
US4490945AJan 1, 1985
Stylus manufacturing apparatus and method
RCA CORP3 citations62