Inventor
ROLLHAUS PHILIP E
US5 patents
⚠️ This page may combine multiple inventors who share the name “ROLLHAUS PHILIP E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SPECTRADISC CORP
3 patentsUS6434109B2Aug 13, 2002
Machine-readable optical disc with reading-inhibit agent
SPECTRADISC CORP109 citations96
US6011772AJan 4, 2000
Machine-readable optical disc with reading-inhibit agent
SPECTRADISC CORP253 citations96
US6343063B1Jan 29, 2002
Machine-readable optical disc with reading-inhibit agent
SPECTRADISC CORP78 citations94