John Derek Lewins

KB Koninklijke Emballage Industrie Van Leer Bv: 2 patents #7 of 37Top 20%

Overall (All Time): #1,247,887 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
7544231	Recovery of platinum group metals	Alan Bax, Grenvil Marquis Dunn	2009-06-09
7282080	Process for extracting platinum group metals	Alan Bax	2007-10-16
4723566	Valve closure	—	1988-02-09
4529105	Valve unit for liquid container	—	1985-07-16