Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [us1239172]

The tag has no usage guidance.

0
votes
1answer
17 views

1917 Patent US1239172 A

I just found this patent from Sept. 4, 1917 that my Great Grandfather designed and filed for patent in 1916. How would I find out if it was bought, used, etc.?