HANSON PIPE & PRODUCTS NORTHWEST, INC.
Patent Owner
Stats
- 3 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Nov 23, 1999 most recent publication
Details
- 3 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 61 Total Citation Count
- May 10, 1984 Earliest Filing
- 1 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
Intl Class
Technology
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Recent Publications
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Recent Patents
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Title
Filing Date
Issue Date
Intl Class
5464152 Method and apparatus for electrically isolating a rail in a precast concrete grade crossingJan 07, 94Nov 07, 95[E01B]
Expired/Abandoned/Withdrawn Patents
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