P&S


U.S. PATENTS ACKNOWLEDGE AND EMPLOY P&S

Here are some patents that acknowledge and employ P&S. They are dated from 1902 to 1996, and answer the criticism that no one has ever heard of it.

Kemp

Gardner

Gardner

Furst

Furst

Humski

Stahle



This is a link to this article in PDF form. You are welcome to download it and use/share it as you like. I am 80+, so this site may be gone at any time.

Use your go back button to return to the prior page, or click here for the index.