At 02:54 PM 9/3/2005, w3qx@qsl.net wrote:
>B&W filed patents.
Yep.. 4423423 is probably the one of interest to most readers... 600 ohm
resistor, 4:1 transformer, etc. Issued in 1983 (so it expired in 2000,
assuming they paid all their maintenance fees.. they may not have bothered)
Interesting that they cite a similar looking antenna patents from the 40s
assigned to RCA, including one from Carter in 1941.
>Search on the U S Patent and Trademark Office site
>
>
>skip to http://patft.uspto.gov/netahtml/search-bool.html
It's also interesting to look at the patents that reference the Bush/B&W
patent:
Astron has a patent on a variant: 5,111,213 (4:1 coax transformer, and
various resistors and capacitors).. funded under an SBIR contract with NOSC.
Altshuler 5,289,198 has a funky looking folded monopole.
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