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en.wikipedia.org/wiki/Automatic_transmission

The automatic transmission was invented in 1921 by Alfred Horner Munro of Regina, Saskatchewan, Canada, and patented under Canadian patent CA 235757 in 1923. (Munro obtained UK patent GB215669 215,669 for his invention in 1924 and US patent 1,613,525 on 4 January 1927).

www.mistertransmission.com/a-brief-history-of-the-automatic-transmission

Designers spent decades perfecting the modern automatic transmission. Here we offer a brief introduction and overview of the history of the automatic transmission. The First Automatic Transmissions. The first automatic transmission was invented in 1921 by a Canadian steam engineer, Alfred Horner Munro.

itstillruns.com/history-manual-transmissions-5163365.html

Manual transmissions were the standard on most vehicle for the first half of the 20th century, but automatic transmissions were being developed as far back as 1904. General Motors introduced the clutchless automatic transmission under the moniker, Hydra-Matic, in 1938, but the first true fully automatic transmission didn't appear until 1948 ...

www.nwtgearboxes.co.uk/2013/04/09/who-invented-the-automatic-gearbox

The question of who invented the automatic gearbox has a number of potential answers with competing claims as to who holds the distinction. There are the early prototypes that hinted at a solution.

www.mistertransmission.com/transmission-history

Automatic Transmission. The automatic transmission, introduced in 1939, switches to the optimum gear without driver intervention except for starting and going into reverse. The type of automatic transmission used on current American cars usually consists of a fluid device called a torque converter and a set of planetary gears.

forums.anandtech.com/threads/who-invented-the-first-fully-automatic...

just wonderin if ATOT has this knowledge without going to google. and then who invented the first fully automatic transmission that made it to a mass...

ateupwithmotor.com/terms-technology-definitions/hydramatic-history-part-1

GM’s original Hydra-Matic transmission was one of the most important innovations in the history of the automobile. It wasn’t the first automatic transmission, but it was the first one that really worked and its resounding commercial success paved the for every subsequent auto-shifter.

answersdrive.com/how-was-the-automatic-transmission-invented-2902291

The automatic transmission was invented in 1921 by Alfred Horner Munro of Regina, Saskatchewan, Canada, and patented under Canadian patent CA 235757 in 1923. (Munro obtained UK patent GB215669 215,669 for his invention in 1924 and US patent 1,613,525 on 4 January 1927).

driving.ca/.../news/hail-hydra-matic-the-rise-of-the-automatic-transmission

Shifting Times: The rise of the automatic transmission ... Just who came up with the first automatic transmission is as muddled a tale as who invented the automobile (and don’t necessarily ...

en.wikipedia.org/wiki/Oscar_H._Banker

Oscar H. Banker (born Asatour Sarafian; May 31, 1895 – January 1979) was an Armenian American inventor who patented a number of works, including an automatic transmission for automobiles, the needleless inoculation gun, the primary controls of the first Sikorsky helicopter, and power steering.