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Lakeville, MN, United States of America

John A Campbell

USPTO Granted Patents = 2

Average Co-Inventor Count = 3.0

ph-index = 2

Forward Citations = 43(Granted Patents)

Location History:

Minneapolis, MN (US) (1978)
Lakeville, MN (US) (1990)

Company Filing History:

Donaldson Comapny, Inc.

Years Active: 1978-1990

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2 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4969537 - Muffler assembly and method of manufacture (1990-11-13),

2. 4113289 - Exhaust system and muffler lap joint (1978-09-12),

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