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Leadholder or Related Patent Thumbnail Index |
 http://leadholder.com/pat-us01908491-1931-clutch.html |
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date of application date granted inventor assignee patent holder country |
1931 Novermber 27 1933 May 9 Max Steiger – Switzerland |
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| see also | Swiss patent no. 164743, 1932–33 |
  
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