Inventor · disambiguated record
Douglas Schmidt
Also filed as: SCHMIDT DOUGLAS · SCHMIDT DOUGLAS W
11 granted patents·315 citations·filing 1989–2018
93Inventor score
Files withHUDSON TECHNOLOGIES INC6HUDSON TECH INC2PURINA ANIMAL NUTRITION LLC1SCHMIDT DOUGLAS W1ZUGIBE KEVIN1
Top patents by PatentIndex Score
11 records- 0197US6505475B1Method and apparatus for measuring and improving efficiency in refrigeration systemsHUDSON TECHNOLOGIES INC·Filed 2000·Granted Jan 14, 2003·148 cites·24 claims
- 0295US10605507B1Method and apparatus for measuring and improving efficiency in refrigeration systemsHUDSON TECH INC·Filed 2018·Granted Mar 31, 2020·9 cites·20 claims
- 0395US10041713B1Method and apparatus for measuring and improving efficiency in refrigeration systemsHUDSON TECH INC·Filed 2015·Granted Aug 7, 2018·8 cites·20 claims
- 0495US9222712B1Method and apparatus for measuring and improving efficiency in refrigeration systemsHUDSON TECHNOLOGIES INC·Filed 2012·Granted Dec 29, 2015·13 cites·20 claims
- 0595US7086240B1Method and apparatus for measuring and improving efficiency in refrigeration systemsHUDSON TECHNOLOGIES INC·Filed 2005·Granted Aug 8, 2006·38 cites·21 claims
- 0694US7805952B1Method and apparatus for measuring and improving efficiency in refrigeration systemsHUDSON TECHNOLOGIES INC·Filed 2009·Granted Oct 5, 2010·23 cites·20 claims
- 0794US7533536B1Method and apparatus for measuring and improving efficiency in refrigeration systemsHUDSON TECHNOLOGIES INC·Filed 2006·Granted May 19, 2009·26 cites·34 claims
- 0892US8327653B1Method and apparatus for measuring and improving efficiency in refrigeration systemsZUGIBE KEVIN·Filed 2010·Granted Dec 11, 2012·9 cites·20 claims
- 0989US7059143B1Method and apparatus for measuring and improving efficiency in refrigeration systemsHUDSON TECHNOLOGIES INC·Filed 2003·Granted Jun 13, 2006·33 cites·37 claims
- 1039US10772293B2Animal feed activity collection apparatuses, methods and systemsPURINA ANIMAL NUTRITION LLC·Filed 2016·Granted Sep 15, 2020·0 cites·11 claims
- 1131US4920651ASheetrock beveling apparatusSCHMIDT DOUGLAS W·Filed 1989·Granted May 1, 1990·8 cites·4 claims
Join the waitlist — get patent alerts
Get an alert when Douglas Schmidt 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 →