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Re: ViewMaster Viewer patent numbers

  • From: P3D John W Roberts <roberts@xxxxxxxxxxxxxxxxx>
  • Subject: Re: ViewMaster Viewer patent numbers
  • Date: Tue, 20 May 1997 00:43:36 -0400

>Date: Mon, 19 May 1997 21:51:14 -0500
>From: P3D Andrew Woods <andrew@xxxxxxxxxxxxxxxxxxxxx>
>Subject: Re: ViewMaster Viewer patent numbers

>...Interested to see what patents there might be on viewmasters,
>I checked out the IBM US patent server:  
>   http://patent.womplex.ibm.com/ibm.html

>I didn't find the original viewmaster patent.  Anyone?

It probably dates from the time before the period that's mainly covered
by the IBM site. The PTO site probably also doesn't go back far enough.
It looks like you may have to go back to the arduous methods that were
employed before online databases. :-(

John R


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