Growing community of inventors

Prior Lake, MN, United States of America

Don Harold

Average Co-Inventor Count = 5.00

ph-index = 4

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 249

Don HaroldJohn R Hacker (4 patents)Don HaroldBruce R Crenshaw (4 patents)Don HaroldDonald Francis Engel (4 patents)Don HaroldDolan D Bartels (4 patents)Don HaroldDon Harold (4 patents)John R HackerJohn R Hacker (71 patents)Bruce R CrenshawBruce R Crenshaw (38 patents)Donald Francis EngelDonald Francis Engel (36 patents)Dolan D BartelsDolan D Bartels (14 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Donaldson Comapny, Inc. (4 from 1,404 patents)


4 patents:

1. 6521009 - Reverse flow air filter arrangement and method

2. 6413289 - Reverse flow air filter arrangement

3. 6322602 - Reverse flow air filter arrangement

4. 6258145 - Reverse flow air filter arrangement

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as of
12/21/2025
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