Certiorari Denied April 7, 1969. See 89 S.Ct. 1308.
BREITENSTEIN, Circuit Judge.
The issue is the validity of United States patent No. 2,778,637, the Eash patent, covering a single-reel, endless-magnetic-tape cartridge used in playback machines for sound reproduction. The cartridges contain prerecorded tape and, in connection with playback machines, are commonly used in the home and the
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