OK , got one in the mail today.
Nickel plated brass, VERY easy to make.
One problem, the patent number stamped on it! I am going to contact Dubro and see what they think.
techiniclly, if I improve the design they will have no recourse.
we will see
If you can make it, I want 10!!!
Seriously.
How long do Patents last? I thought they expire after a certian period of time. These things have been around for years.
I think a patent is good for 15 years.
Patent duration, or the time a patented invention or design is protected against infringement from other companies or individuals, varies according to the type of patent you have been granted. Utility patents and plant have a different duration than design patents.