Phonograph patent reference resources...
Posted: Fri Feb 05, 2021 8:36 pm
http://www.phonozoic.net/patents/index.html
https://griffonagedotcom.wordpress.com/ ... 1878-1912/
http://patft.uspto.gov/netahtml/PTO/index.html
https://www.uspto.gov/patents/search#heading-1
http://patft.uspto.gov/netahtml/PTO/help/images.htm
https://edison.rutgers.edu/phonpats.htm
https://unctv.pbslearningmedia.org/reso ... raph-1877/
https://www.nps.gov/edis/learn/historyc ... ograph.htm
https://griffonagedotcom.wordpress.com/ ... 1878-1912/
http://patft.uspto.gov/netahtml/PTO/index.html
https://www.uspto.gov/patents/search#heading-1
http://patft.uspto.gov/netahtml/PTO/help/images.htm
https://edison.rutgers.edu/phonpats.htm
https://unctv.pbslearningmedia.org/reso ... raph-1877/
https://www.nps.gov/edis/learn/historyc ... ograph.htm