In the rubber footwear sense of the question: John Cowie. A England-raised businessman who started a plastics manufacturing business in Hong Kong after the war. It was Cowie that started manufacturing a plastic version of the Japanese wooden sandals in the late 1940s. New Zealander Morris Yock imported from John Cowie and Co. and claimed the concept as his own which he patented in 1957. John Cowies children say that their father claimed to have invented the name Jandal from a shortened form of 'Japanese Sandal'. John Cowie and family emigrated to New Zealand in 1959.
William Eccles and F.W. Jordan. (electrical 'flip flop')
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I do not know when they were invented but I can tell you they were popular in the 1970's with flip flops.
flip flop the hair smile an make sure their is nothing in your teeth an make sure there white [just for girls]....... boys look at her an have her look at you an talk to her an if you have any hair flip flop it skater style an walk kool ,ride kool , invite her over in your house take her to your parents an ask if she could stay for dinner after that take her back home an kiss her ....thats the best way to inprove on turning a girl on or women whatever
Who invented the first stagecoach?
Kilobytes and vacuum tubes are not in the same category. At best, a twin triode vacuum tube is a single flip-flop and can hold 1 bit of information, making a vacuum tube about 0.000122 of a kilobyte.
This is the technique for high jumping that everybody uses nowadays. The jumpers goes over the bar backwards. Fosbury invented it and it produced record high jumps.