1985-86 - The Pipeline Delivery System

   United States Patent 4937821  (referred to by 112 patents including patents by Apple, Intel, Scientific Atlanta, Bell Atlantic, ICTV, and TV Guide)
An information delivery system which continuously provides sets of information which can be selected by a user. Digital data is encoded as analog signals which are used to amplitude modulate a carrier signal. A plurality of such modulated carrier signals, each constituting a subchannel, are mixed together to form a single channel which can be delivered to a user over a cable or otherwise. The data provided on each carrier in the channel constantly repeats itself so that the entire set of data on a particular carrier wll be available to a user in a relatively short time regardless of the time of access by the user. A first subchannel contains an index to the remaining subchannels to allow user selection of a particular set of information.

Lawyers for Sirius Satellite recently (2008) used elements of the patent and design in defense of their own patents:

Dear Mr. Boulton, 

My law firm represents Sirius Satellite Radio in a patent litigation brought by Finisar Corporation. Your patent for a Pipeline Information Delivery System (U.S. Patent No. 4,937,821) is very similar to Finisar's later patent.  I would very much like to speak with you about the patents.  Would there be a good time for me to give you a call?

 

 

Aaron M. Frankel

 Associate
Kramer Levin Naftalis & Frankel LLP
1177 Avenue of the Americas
New York, New York 10036
 

 

 
 





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