Northwest pipe company receives u.s. patent for innovative infrashield® joint system

The company's revolutionary system enhances steel pressure pipe resilience in differential settlement and seismic applications vancouver, wash. , feb. 12, 2025 /prnewswire/ -- northwest pipe company (nasdaq: nwpx), a leading manufacturer of water-related infrastructure, is proud to announce that the united states patent and trademark office has issued u.s. patent no.
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