Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Dual radial position servo to compensate for radial tracking failure in an optical disc player

Dual radial position servo to compensate for radial tracking failure in an optical disc player

US Patent 4239942 · Granted Dec 16, 1980

Estimated economic value: $461,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Optical disc reader having lens mounting with improved positioning control1989
Process for flavoring tobacco1986
Process for utilizing tobacco dust1986
Disc-record player with pressure means for pressing a disc onto a turntable1986
Process for flavoring dry vegetable matter1985
Opto-electronic focusing-error detection device1985
Optical scanning unit for reading information from an optical recording1984
Semiconductor laser device with an assembly block1982