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Bloomington, MN, United States of America

Richard D Lewis

This inventor holds 4 USPTO granted patents. Top assignee: Graco Inc.. Active years: 1989-1993.

USPTO Granted Patents = 4

% Patents Active = 100.0

Average Co-Inventor Count = 2.4

ph-index = 3

Forward Citations = 21(Granted Patents)

Company Filing History:

Years Active: 1989-1993

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4 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5222518 - Air flow control valve (1993-06-29),

2. 5176176 - Non-degrading back pressure regulator (1993-01-05),

3. 4887639 - Non-degrading pressure regulator (1989-12-19),

4. 4843841 - Energy conserving refrigeration device (1989-07-04),

Profile summary based on public USPTO records.

Please report any incorrect information to [email protected]

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