Inventor
LEE CYRIL ARTHUR
3 patents
Patents
3 patentsUS4038596AJul 26, 1977
Method and apparatus for authenticating a record medium consisting of applying two different strength magnetizing fields and monitoring the remanent fields
EMI LTD144 citations91
US4114029ASep 12, 1978
Magnetic recording
EMI LTD23 citations78
US4023204AMay 10, 1977
Magnetic recording
EMI LTD14 citations69