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USPTO Patent Rankings Data through Dec 31, 2025
Home › Keltech › Larry Hartman
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Larry Hartman — 4 Patents

KEKeltech: 3 patents #2 of 5Top 40%
BWBradford White: 1 patents #21 of 42Top 50%
Kalamazoo, MI: #381 of 1,283 inventorsTop 30%
Michigan: #22,248 of 86,293 inventorsTop 30%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Larry Hartman has been granted 4 US patents while listed as an inventor at Keltech. The first was granted in 2014 and the most recent in November 2022. Larry Hartman ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Larry Hartman in Kalamazoo, MI, US.

Patents per Year

Patents granted per year, 2014 to 2022Bar chart with a peak of 1 patents in 2014.peak 12014: 1 patents20142017: 1 patents20172018: 1 patents20182022: 1 patents2022

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
11499746 Modular manifold for a tankless water heater Kenneth E. Lutz, II 2022-11-15
9964241 Connection assembly Ken Lutz 2018-05-08
9574792 Modular manifold for a tankless water heater Kenneth E. Lutz, II 2017-02-21
8787742 On-demand water heating system Kenneth E. Lutz, II, Evan Lutz 2014-07-22

Frequent Collaborators

Kenneth E. Lutz, II3 shared
Evan Lutz1 shared
Ken Lutz1 shared

Nearby-Ranked Inventors

Jagadeesh Kandasamy4
Ross CABOT4
George Ueda4
Franz A. Gruswitz4
Tommy Glimberg4
Vinayakaraddy Gulabal4
Sandra Bittorf4
Aviel FOGEL4
Eric Matthew Walton4