230576. Baird, John Logie (1923, December 29)

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230576. Baird, John Logie (1923, December 29)

Postby Stephen » Fri May 04, 2007 2:26 am

This is the patent for the Baird or lens disc, an improvement over the Nipkow or aperture disc.
Mr. Baird's lens disc patent.
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Anyone have a spare straightjacket?
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