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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Aafjes; Reindert
Address:
Wormerveer, NL
No. of patents:
1
Patents:












Patent Number Title Of Patent Date Issued
4913694 Method for manufacturing a picture and/or text changing slide April 3, 1990
Method for manufacturing a picture- and/or textchanging slide, in which a piece of planar material is subdivided into three sections, of which two sections provided with changing strips formed by incisions are folded onto each other and are thereafter shifted in position relative to one










 
 
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