The two famous gunmakers were Charles & Henry, I'm not sure how well known Joseph was.

Henry died in 1888.

Henry's son Henry was alive and signed Wundhammers papers and took out a patent with George Walter Slotterbeck.

George Walter Slotterbeck was born 5th of February 1875 in California. His mothers name was Sophia and he worked as a iron worker in a pipe shop. I have no idea how or if his is related to Henry Jr.

MP Sadly Deceased as of 2/17/2014