There is no such thing as "holding patents with an association".
At the time of his 1970 retirement, he held 39 patents.
He also worked as a consultant and held many patents.
It cannot be a copy because they do hold very similar patents.
A number of other companies also hold patents in this arena.
He held two important patents but, in both cases, the invention was the work of another.
He held 50 patents and published more than 40 papers.
He has held more than 15 patents and published over 300 papers.
As a nation, only ten other countries hold more patents than Sweden.
He was the author of 50 technical papers and held 10 patents.