Inventor · disambiguated record
Karl Frei
Also filed as: FREI KARL
6 granted patents·193 citations·filing 1984–2019
84Inventor score
Top patents by PatentIndex Score
6 records- 0188US4537511AApparatus for generating and radiating ultrasonic energyTELSONIC AG·Filed 1984·Granted Aug 27, 1985·91 cites·9 claims
- 0281US5653346AProcess and device for sifting, sorting, screening, filtering or sizing substancesTELSONIC AG·Filed 1994·Granted Aug 5, 1997·68 cites·33 claims
- 0358US6694705B1Defoaming device for a packaging machineTETRA LAVAL HOLDINGS & FINANCE·Filed 1999·Granted Feb 24, 2004·18 cites·18 claims
- 0452US11823815B2Shield for a terminal of a high-voltage electrical device and method for operating the sameHITACHI ENERGY LTD·Filed 2019·Granted Nov 21, 2023·0 cites·15 claims
- 0539US6039867ADevice for continuous disintegration of activated sludgeTELESONIC AG·Filed 1999·Granted Mar 21, 2000·10 cites·8 claims
- 0633US5895577AMethod for continuous disintegration of activated sludgeTELSONIC AG·Filed 1997·Granted Apr 20, 1999·6 cites·10 claims
Join the waitlist — get patent alerts
Get an alert when Karl Frei 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 →