"D Murphy" wrote in message
...
"Ed Huntress" wrote in
:


"Clark Magnuson" wrote in message
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http://www.6mmbr.com/gunweek055.html

Using EDM to cut rifling is at least 30 years old, although I don't
know if it was ever used in any kind of production (ECM has been used
to rifle barrels for longer than EDM, and it's been used in
production). However, I hadn't heard of using it to cut chambers. I'd
like to know what the "patent" is about.

Hey Ed, good to see you posting a bit again. The patent is here -

http://tinyurl.com/98aqk

I sure don't see why they were issued a patent.

Hoho! If that's worth a patent, then every application for EDM is worth a
patent. I'll bet that one would fall flat on its face if it was ever
challenged in court.

Thanks for the welcome, Dan. I had a little spare time this weekend. It's
just about gone. g

--
Ed Huntress