Average Co-Inventor Count = 1.33
ph-index = 2
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Wirsbo Bruks Ab (1 from 4 patents)
2. Erik Sorberg Armaturfabrik Aktiebolag (1 from 1 patent)
3. Aktiebolaget Fellingsbro Verkstader (1 from 1 patent)
2 patents:
1. 5744085 - Pipe-end expanding method and a tool therefor
2. 4129149 - Control valve means