Assignee
KWH PIPE AB OY
FI·10 granted patents·2 pending applications·256 citations·filing 1989–2013
Top patents by PatentIndex Score
12 records- 0191US5127442APlastic tube formed by spiral winding of hollow sectionKWH PIPE AB OY·Filed 1989·Granted Jul 7, 1992·70 cites·7 claims
- 0290US5591292AWelding method in the manufacture of a spirally wound tube and a welding head for performing the methodKWH PIPE AB OY·Filed 1993·Granted Jan 7, 1997·82 cites·10 claims
- 0384US8932681B2Method and apparatus for coating pipesKWH PIPE AB OY·Filed 2013·Granted Jan 13, 2015·6 cites·27 claims
- 0482US6939424B1Method of making a spirally-wound tubeKWH PIPE AB OY·Filed 2000·Granted Sep 6, 2005·38 cites·17 claims
- 0567US6666945B1Preparation of an end of a thermoplastics tube manufactured by spirally winding a hollow profileKWH PIPE AB OY·Filed 2000·Granted Dec 23, 2003·10 cites·6 claims
- 0653US5431762AMethod for joining spirally wound thermoplastic pipes togetherKWH PIPE AB OY·Filed 1992·Granted Jul 11, 1995·17 cites·8 claims
- 0750US7347910B2Method for manufacturing a container end wall of lightweight construction and a container provided with such an end wallKWH PIPE AB OY·Filed 2002·Granted Mar 25, 2008·1 cites·14 claims
- 0850US5411619AMethod for manufacturing a joint pipeKWH PIPE AB OY·Filed 1992·Granted May 2, 1995·19 cites·8 claims
- 0947US2010213701A1Method and device for joining pipesKWH PIPE AB OY·Filed 2006·Application pending·0 cites
- 1046US2011127262A1Container with antistatic layerKWH PIPE AB OY·Filed 2009·Application pending·0 cites
- 1143US7770604B2Hollow profile used in the manufacture of a pipeKWH PIPE AB OY·Filed 2004·Granted Aug 10, 2010·6 cites·12 claims
- 1236US6322653B1Method for joining spiral wound pipesKWH PIPE AB OY·Filed 1999·Granted Nov 27, 2001·7 cites·10 claims
Join the waitlist — get patent alerts
Get an alert when KWH PIPE AB OY files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →