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Bloomington, MN, United States of America

Donald D Gronholz

USPTO Granted Patents = 4

Average Co-Inventor Count = 1.8

ph-index = 4

Forward Citations = 221(Granted Patents)

Location History:

Minneapolis, MN (US) (1985)
Bloomington, MN (US) (1977 - 1987)

Company Filing History:

Donaldson Comapny, Inc.

1 out of 832,812

Other

patents

Years Active: 1977-1987

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4 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4657570 - Air filter device (1987-04-14),

2. 4617122 - Crimp seal pleated filter assembly (1986-10-14),

3. 4512891 - Pleated filter element with controlled expansibility and frame therefor (1985-04-23),

4. 4044805 - Router guide unit (1977-08-30),

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