US M1 helmet liner.

**ekim2525** · 08-30-2018, 09:36 PM

Does anyone hold a patent on the M1 helmet liner? I know Westinghouse made the most of them during WWII. I was told they hold the patent on the liner, is that true?

**MAP** · 08-30-2018, 10:01 PM

If anyone did hold a patent, it's probably expired by now. Patents typically on last 14 to 20 years (in the US)

**ekim2525** · 09-01-2018, 05:32 PM

by MAP

If anyone did hold a patent, it's probably expired by now. Patents typically on last 14 to 20 years (in the US)

Thanks, but what I wanted to know is if anyone held a patent for the original liner. I was told it was Westinghouse.

**rbminis** · 09-01-2018, 06:21 PM

As this is not an introduction, I have moved your thread to the correct section of the forum.
Ralph.

**Tank Destroyer** · 09-01-2018, 06:58 PM

I am not sure if Anyone other than the government held the patent. Hawley was the first using the Riddle suspension. But then the low pressure liner was introduced in early 42 after the Hawley liner did not hold up very well. After the low pressure liner the high pressure liner came along in mid 42. Yes Westinghouse made the most but not sure if Westinghouse held the patent.

Marty