Per Helland — 2 Patents at Prototech As

Per Helland has been granted 2 US patents while listed as an inventor at Prototech As. The first was granted in 1984 and the most recent in March 2001. Per Helland ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Per Helland in Kristiansand, NO.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
6203548	Distraction apparatus	—	2001-03-20
4488542	External setting and correction device for the treatment of bone fractures	—	1984-12-18

Per Helland — 2 Patents

Issued Patents All Time

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