Ernst Ettema

WB Wavin B.V.: 1 patents #5 of 13Top 40%

📍 Hardenberg, NL: #4 of 8 inventorsTop 50%

Overall (1982): #66,731 of 81,411Top 85%

Patents 1982

Issued Patents 1982

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4308966	Crates	Coenraad J. B. M. Benraad	1982-01-05