Inventor · disambiguated record

Philip A. Defriend

Also filed as: DEFRIEND PHILIP A

2 granted patents·88 citations·filing 1992–1996

66Inventor score
Technology areasC08F
Files withSHELL OIL CO2

Top patents by PatentIndex Score

2 records

Join the waitlist — get patent alerts

Get an alert when Philip A. Defriend 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 →