JH

John R. Hacker

DC Donaldson Company: 2 patents #7 of 75Top 10%
Caterpillar: 1 patents #101 of 431Top 25%
📍 Minneapolis, MN: #50 of 388 inventorsTop 15%
🗺 Minnesota: #587 of 4,549 inventorsTop 15%
Overall (2002): #58,457 of 266,432Top 25%
2
Patents 2002

Issued Patents 2002

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6413289 Reverse flow air filter arrangement Donald F. Engel, Dolan Bartels, Bruce Crenshaw, Don Harold 2002-07-02
6384369 Liquid filter construction and methods Eivind Stenersen, David B. Harder, Gerald D. Kiral, Ronald W. Streitmatter, Kevin K. Socha 2002-05-07