IP Library › Granted Patent US 6,637,092
Granted Patent Utility PCT National Stage
US 6,637,092 · Confirmation No. 6098

METHOD AND APPARATUS FOR WINDING A HELICAL PIPE FROM ITS INSIDE

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2001-03-21 LET. Miscellaneous Incoming Letter 46 View
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Quick Facts
Patent No.
US 6,637,092
App. No.
09/787,662
Filed
2001-03-21
Granted
2003-10-28
Art Unit
3726
PTA
0 days