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Ralph M. Onstenk

WBWavin B.V.: 2 patents #23 of 114Top 25%

EAE.I. Du Pont De Nemours And: 1 patents #4,343 of 8,010Top 55%

Papendrecht, NL: #11 of 64 inventorsTop 20%

Overall (All Time): #2,339,367 of 4,157,543Top 60%

2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
D298379	Drum	Bernardus A. Lesscher, Edward H. Hamilton	1988-11-01
4674650	Container and cover fastening means	Edward H. Hamilton, Bernardus A. Lesscher	1987-06-23