"...It was Denzil Wraight, in fact, who rediscovered Strafford's work
on noise
reducing antennas,..."

After reading the above statement I don't see where you and Denzil have
created something that could be plagarized. You and Denzil did what a
lot of others have done in the world of amateur radio, and that is to
use, combine and possibly update the work of others.

It is great that you have continued the research on noise reducing
antennas, but by your own words you cannot claim ownership. This
topic has been researched and rehashed for decades. Since Strafford
published in 1937 and is probably long gone from this world, his
descendants should be the ones to raise a complaint. But then again
maybe Strafford used the work of someone else...what do you think.