Dilbert_X wrote:
Except......
In the 1940s America didn't have a technical lead over anyone.
America was the Apple of the technology world. We didn't always invent everything first, but we saw practical uses for inventions and jumpstarted their popularity. (Then we usually claimed we invented it, as we added rounded corners.)
Radio waves were predicted by a Scottish scientist in the 1860s, but in 1866 an American dentist displayed the first wireless telegraphy and aerial wireless communication. This was 20 years before Hertz (German) demonstrated the first radio wave frequencies. An Italian is credited with proving this could be used to send and receive messages in 1902. But in 1899, the US army already had wireless communication with ships. In 1901, Hawaii had a radiotelegraph service installed to communicate between the islands. In 1904, the vacuum tube was invented in Britain (a diode tube). In 1906, Lee De Forest (an American) invented the triode vacuum tube, allowing a radio system to be capable of carrying voice. In 1907, De Forest invented the Audion vacuum tube, which was used in almost everything electronic until the transistor was invented in 1947. De Forest also invented the AM radio.
Other American Inventions:
1901:
The vacuum cleaner
Instant Coffee (Japanese American, in America)
1902:
The Air Conditioner
1903:
First gas motored manned aircraft
Bottle making machinery
The Tractor
Windshield Wipers
1906:
Sonar
1907:
First synthetic plastic (By a Belgium-American, in America)
1910:
First talking motion picture
1911:
Electrical ignition system for cars
1912:
Motorized movie cameras
1913:
The bra
1914:
Gas mask
1915:
Pyrex
1918:
The superheterodyne radio circuit
1920:
Tommy gun
Band-Aids
1923:
Frozen Food
1924:
Moving coil loudspeaker
1926:
Liquid fueled rockets
1927:
Electronic television system
Technicolor
The iron lung
1928:
Electric Razor
1929:
Car radio
1930:
Scotch tape
Neoprene
Differential analyzer (analog computer)
1931:
Stop motion photography
1932:
Polaroid instant photographs
Parking meter
Radio Telescope
1933:
FM Radio
Drive-In Movie theater
1935:
Nylon
Canned beer
1936:
Voice recognition machine
Colt revolver
1937:
Photocopier
1938:
Teflon
1940:
Color television
The Jeep
Ameripol (synthetic rubber)
1942:
Nuclear reactor (Led by an Italian-American in Chicago)
Electronic Digital computer
1943:
Plastic putty (Silly putty)
1944:
Synthetic cortisone
1945:
Hypertext
Atomic bomb (Numerous countries of origin involved, invented in America)
1946:
Microwave oven
1947:
Mobile telephone
Transistor
Tupperware seal
Considering the number of revolutionary, technological advancements on this list, and the number that made world-wide impact and are still in use today, I have to say I disagree with your assessment that "In the 1940s America didn't have a technical lead over anyone."