[QuadList] Alfecon II Video Heads (Was Quad Heads--When metal tips gave way to Ferrite... and what role Spin Physics played--)

[David Crosthwait]

It helps to spell "Alfecon" correctly:

http://www.google.com/patents/US3676610

http://www.google.com/patents/US3661570

David


On Sep 4, 2014, at 9:37 PM, David Crosthwait via QuadList wrote:

> 
> 
> From: David Crosthwait <david at dcvideo.com>
> Date: September 4, 2014 9:36:57 PM PDT
> To: Quad List <quadlist at quadvideotapegroup.com>
> Subject: Re: [QuadList] Alfecon II Video Heads (Was Quad Heads--When metal tips gave way to Ferrite...	and what role Spin Physics played--)
> 
> 
> Hello Gary,
> 
> This is it (or part of) what I was referring to (but still searching):
> 
> http://www.google.com/patents/US3479738
> 
> J. J. HANAK MAGNETIC HEADS Nov. 25, 1969 Filed May 23, 1967 II I I mvnvron JEJEPH Joy/v HAN/1K BY {ii/ M 9 E!- United States Patent 3,479,738 MAGNETIC HEADS Joseph John Hanak, Trenton, N.J., assignor to RCA Corporation, a corporation of Delaware Filed May 23, 1967, Ser. No. 641,443 Int. Cl. H01f 7/06; Gllb 5/42 US. Cl. 29-603 6 Claims ABSTRACT OF THE DISCLOSURE 
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