Quote:
|
Originally Posted by porterkids
The Pat. Pend. was added in 1987. You can find both three-line and four-line Buck bayonets with the 1987 date code.
|
My mistake
For those interested, I was looking at the Finn patent
http://www.m9bayonet.com/library/04821356.pdf
in a different topic and I found that:
Patent Filed:
March 13 1987
Date of patent:
April 18 1989
So anything between those two years, including 1987 and 1989, should be "
patent pending".