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CALIFORNIA CORRUGATED CULVERT

CALIFORNIA
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US1985899A Pipe slip joint Expired / Lapsed 1932-08-03 1935-01-01 0 Details
US1707433A Automatic electric welding apparatus Expired / Lapsed 1927-02-15 1929-04-02 0 Details