Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Michael D. Grassmuck — 7 Patents

HUHussmann: 7 patents #15 of 167Top 9%
Bridgeton, MO: #5 of 97 inventorsTop 6%
Missouri: #3,100 of 23,789 inventorsTop 15%
Overall (All Time): #680,018 of 4,157,543Top 20%
7 Patents All Time
Michael D. Grassmuck has been granted 7 US patents while listed as an inventor at Hussmann. The first was granted in 1991 and the most recent in October 2014. Michael D. Grassmuck ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list Michael D. Grassmuck in Bridgeton, MO, US.

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDate
8858309 Air louver for refrigerated display case Garrick N. McFarland, Scott E. Miller 2014-10-14
7856770 Multi-pane glass assembly for a refrigerated display case Garrick N. McFarland, John D. Withouse 2010-12-28
7497770 Air louver for a refrigerated display case Garrick N. McFarland, Scott E. Miller 2009-03-03
7318321 Open-front, roll-in refrigerated display case Martin Duffy, John D. Withouse, Dennis L. Dickerson, Aaron Hernandez 2008-01-15
7240506 Illuminated canopy for a refrigerated display case Oswaldo Carrillo 2007-07-10
5639149 Glass front merchandiser with invisible hinge and seals 1997-06-17
4990749 Temperature controller for a food merchandiser Michael E. Devine, II, Mason E. Laster, Jr., Nai H. Mak 1991-02-05