We have one object that Mr. John Willenbecher has been involved with.

If you would like to cite this person in a Wikipedia article please use the following template:

<ref name=CH>{{cite web |url=https://collection.cooperhewitt.org/people/18041817/ |title=Mr. John Willenbecher |author=Cooper Hewitt, Smithsonian Design Museum |accessdate=24 October 2017 |publisher=Smithsonian Institution}}</ref>