Sven Sjöberg — 9 Patents at Oy Kwh Pipe Ab

Sven Sjöberg has been granted 9 US patents while listed as an inventor at Oy Kwh Pipe Ab. The first was granted in 1988 and the most recent in January 2018. Sven Sjöberg ranks #535,341 of 4,157,543 US inventors in our database (top 12.9%). Patent records list Sven Sjöberg in Saariselkä, FI.

Patents per Year

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #	Title	Co-Inventors	Date
9862136	Method and apparatus for spirally winding a thermoplastic profile in the manufacture of welded plastic tubes	Christian Glasberg, Kari Karjalainen, Johan Portman	2018-01-09
9821514	Method and apparatus in the manufacture of a spirally wound and welded tube	Christian Glasberg, Kari Karjalainen	2017-11-21
9550210	Method of coating pipes or pipe sections	Leif Leiden, Jouni Purmonen	2017-01-24
9186838	Apparatus and method for coating pipes or pipe sections	Leif Leiden, Jouni Purmonen	2015-11-17
8932681	Method and apparatus for coating pipes	Leif Leiden, Rauno Smått	2015-01-13
8663767	Hollow profile used in the manufacture of a pipe	Christian Vestman	2014-03-04
8474401	Method and apparatus for coating pipes	Leif Leiden, Rauno Smått	2013-07-02
7770604	Hollow profile used in the manufacture of a pipe	—	2010-08-10
4723660	Apparatus for advancing and sorting objects	—	1988-02-09