[TowerTalk] B&W folded dipoles

[Jim Lux]

At 02:54 PM 9/3/2005, w3qx at 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.