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Re: [photo-3d] Pulfrich-Info
- From: Herbert C Maxey <bmaxey1@xxxxxxxx>
- Subject: Re: [photo-3d] Pulfrich-Info
- Date: Sat, 14 Oct 2000 13:26:27 -0600
>>I would like to know if the Pulfrich system has actually any patent. I
understand that this old phisical >>propertie is public domain. Am I
wright?
>>May be, some glasses, are patented. ( I think that only can refer to
the graphic design of them)
There are dozens of references to the Pulfrich systems in the patent
literature, some have expired and some have not. You can go to the IBM
Patent Server and research it. Go to www.ibm.com, search "Patent" and you
will get a page of links. Click on the Patent Link and it will take you
to a page where you can do a basic search. The Server has moved, but you
can still easily find it.
Bob
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