Inventor · disambiguated record
David Birdwell
Also filed as: BIRDWELL DAVID · BIRDWELL DAVID M
5 granted patents·1 pending application·20 citations·filing 2000–2020
75Inventor score
Top patents by PatentIndex Score
6 records- 0184US10214225B2Thixotropic gel or liquid for friction control and method of using the sameWHITMORE MFG LLC·Filed 2017·Granted Feb 26, 2019·2 cites·19 claims
- 0279US9617498B2Positive friction control composition for railwaysTHE WHITMORE MFG CMOPANY·Filed 2014·Granted Apr 11, 2017·4 cites·21 claims
- 0373US10814890B2Methods of and compositions for controlling frictionWHITMORE MFG LLC·Filed 2019·Granted Oct 27, 2020·0 cites·20 claims
- 0470US10173700B2Top of rail applicator and method of using the sameWHITMORE MFG LLC·Filed 2015·Granted Jan 8, 2019·1 cites·23 claims
- 0569US2021024106A1Friction control composition with high and positive friction characteristicsWHITMORE MFG LLC·Filed 2020·Application pending·0 cites
- 0655USD439414SScrub brushBIRDWELL CLEANING PRODUCTS INC·Filed 2000·Granted Mar 27, 2001·13 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →