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[TowerTalk] Force 12 - Patents

Subject: [TowerTalk] Force 12 - Patents
From: Roger Parsons <>
Date: Mon, 24 Sep 2007 16:26:12 +0100 (BST)
List-post: <>
This subject seems to have moved far away from Force

Not sure of the date of the Mertel patent, but Racal
Antennas developed and sold a military tunable antenna
using all of the claims in around 1970, _except_ that
it was a monopole rather than the dipole construction
described. Of course the interface with the radio was
not terribly sophisticated - basically an swr detector
and predetermined lengths for each frequency.

I have no idea whether the Racal antenna was patented
or even original, but in the UK at least, published
prior art invalidates later attempts to patent the
same concept.

73 Roger

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