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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Custom-Pak › Michael Grinnall
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Michael Grinnall — 15 Patents

CUCustom-Pak: 14 patents #2 of 36Top 6%
JCJohnson Level & Tool Mfg. Co.: 1 patents #21 of 34Top 65%
De Witt, IA: #4 of 103 inventorsTop 4%
Iowa: #914 of 15,303 inventorsTop 6%
Overall (All Time): #307,048 of 4,157,543Top 8%
15 Patents All Time
Michael Grinnall has been granted 15 US patents while listed as an inventor at Custom-Pak. The first was granted in 2006 and the most recent in October 2023. Michael Grinnall ranks #307,048 of 4,157,543 US inventors in our database (top 7.4%). Patent records list Michael Grinnall in De Witt, IA, US.

Patents per Year

Patents granted per year, 2006 to 2023Bar chart with a peak of 3 patents in 2019.peak 32006: 1 patents20062007: 2 patents2008: 2 patents20082009: 1 patents2012: 1 patents20122014: 1 patents2017: 1 patents20172019: 3 patents2021: 1 patents20212022: 1 patents2023: 1 patents2023

Issued Patents All Time

Showing 1–15 of 15 patents

Patent #TitleCo-InventorsDate
11771022 Sealed connection for fluid conduit parts Ronald A. Zimmer, Rick Braasch, Mitch Gravert, Craig J. Bormann 2023-10-03
11516975 Sealed connection for fluid conduit parts Ronald A. Zimmer, Rick Braasch, Mitch Gravert, Craig J. Bormann 2022-12-06
11065757 Hybrid single and double wall case John McGarry, Pamela Jo Naeve 2021-07-20
10299446 Sealed connection for fluid conduit parts Ronald A. Zimmer, Rick Braasch, Mitch Gravert, Craig J. Bormann 2019-05-28
10272561 Hybrid single and double wall chainsaw case John McGarry, Pamela Jo Naeve 2019-04-30
10167035 Blow molded toy cycle Jeffrey Scott Anderson, Andrew James McDonnough, Pamela Jo Naeve, Duane Franzen, Alan Walter Knapper 2019-01-01
9682739 Blow molded toy cycle Jeffrey Scott Anderson, Andrew James McDonnough, Pamela Jo Naeve, Duane Franzen, Alan Walter Knapper 2017-06-20
8899416 Soft plastic insert for use in protective case Andrew James McDonnough, Duane Franzen 2014-12-02
8283007 Blow molded receptacle and system for making same Alan Walter Knapper, Daniel E. Koranda 2012-10-09
7578959 Method and apparatus for creating a blow molded case Clay Bahnsen, Daniel E. Koranda, James Wiese 2009-08-25
7455513 System for creating blow molded case David Cozzens, Clay Bahnsen, Steven P. Guidebeck, James M. Wiese 2008-11-25
7393495 Methods and apparatuses for the formation of blow molded objects Alan Walter Knapper 2008-07-01
7182905 Blow molded article with retaining feature and method of creating same Duane Franzen, Terry Lucky 2007-02-27
7172067 Level case with positioning indentations Richard J. Gruetzmacher, Duane Franzen 2007-02-06
6988633 Blow molded article with retaining feature and method of creating same Duane Franzen, Terry Lucky 2006-01-24

Frequent Collaborators

Duane Franzen6 shared
Alan Walter Knapper4 shared
Pamela Jo Naeve4 shared
Rick Braasch3 shared
Mitch Gravert3 shared
Andrew James McDonnough3 shared

Nearby-Ranked Inventors

Naoya Kasahara15
Aaron Larry Snyder15
Avishay Meron15
Stuart Hatfield15
Satoshi KUNIYASU15
Ashton Mason15
Theodore Yuchiang Cheng15
Richard Sharbaugh15
Rajen Bhatt15