SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Technology Stocks : Ampex Corp: Digital Storage
AMPX 8.270-3.0%Dec 26 9:30 AM EST
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: Lee Konkel who wrote (2134)3/6/1997 11:16:00 PM
From: Gus   of 3256
 
Lee,

Thanks. Now when I think of the doctrine of equivalents I'm always gonna have the mental picture of that duck in mind 8=)

Anyway, I don't have the details of the lawsuit in mind, but here's an account written by a Japanese regarding Ampex's core patents in magnetic recording. It is reasonable to infer that their successful protection of those patents became a very useful template for the protection of the other inventions they came up with. At least, that's the calculation going on.

nml.org

Magnetic tape recorder research

In the 1960's, NHK laboratories initiated extensive research activities on magnetic video tape recording. Japan needed to develop its own technology base in this area since Ampex Corporation, the inventor of quadruplex video recording technology, had thoroughly safeguarded its technology through a group of U.S. and foreign patents.Ampex's patent position was so strong and far reaching that any organization intending to manufacture video recorders during the 1960-1980 period had to first become an Ampex licensee. The only exception was RCA, which cross-licensed its color television broadcasting technology in return for Ampex video-recording know-how.

Again, Lee, thanks for your thoughts.

Gus
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2025 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News