Donatus Wichelhaus

Dr. Ing. H.C. F. Porsche Ag: 2 patents #3 of 37Top 9%

📍 Göppingen, DE: #1 of 9 inventorsTop 15%

Overall (1994): #35,040 of 165,921Top 25%

Patents 1994

Issued Patents 1994

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5315961	Hydraulic valve tappet for an internal-combustion engine	—	1994-05-31
5305717	Arrangement for the automatically controlled varying of the relative rotating position of shafts in an internal-combustion engine	—	1994-04-26