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Last updated 21/11/2023


One Way Trays
This page attempts to record what is known about the origin and history of One Way Trays - design that if dropped from a sufficient height will always land only one way up. Please contact me if you know any of this information is incorrect or if you have any other information that should be added. Thank you.


As far as I know this idea first appears, although it is not fully developed, in 'The Magic of Science' by A Frederick Collins, which was published by thge Fleming H Revell Company in London and New York in 1917.