Company Filing History:

1 out of 7

The Clarkson Company

patents

2 out of 832,812

Other

patents

Years Active: 1990-1994

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3 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5330156 - Seal arrangement for valves (1994-07-19),

2. 5150881 - Gate valve sleeve (1992-09-29),

3. 4895181 - Gate valve (1990-01-23),

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For the Inventor, By the Inventor

Thomas P McKavanagh

Location History:

Company Filing History:

Years Active: 1990-1994