Inventor · disambiguated record
Raymond Callahan
Also filed as: CALLAHAN JR RAYMOND E · CALLAHAN RAYMOND
3 granted patents·90 citations·filing 1995–2006
70Inventor score
Top patents by PatentIndex Score
3 records- 0175US6624873B1Matrix-encoded surround-sound channels in a discrete digital sound formatDOLBY LAB LICENSING CORP·Filed 1998·Granted Sep 23, 2003·72 cites·18 claims
- 0275US5639585ASystem for photographically recording digital data and analog soundtrack, and medium having digital data and analog soundtrack recorded thereonSONY CORP·Filed 1995·Granted Jun 17, 1997·18 cites·22 claims
- 0350US7397049B2Determining ion beam parallelism using refraction methodVARIAN SEMICONDUCTOR EQUIPMENT·Filed 2006·Granted Jul 8, 2008·0 cites·24 claims
Join the waitlist — get patent alerts
Get an alert when Raymond Callahan files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →