In what year did Chester Greenwood receive a patent for a revolving umbrella mechanism?
Answer
1907
Historical records indicate that Greenwood received a patent for a revolving umbrella mechanism in 1907.
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The history of how earmuffs were invented by a Maine teenager
Related Questions
At what approximate age did Chester Greenwood invent the earmuffs?What materials constituted the design of Greenwood's original earmuffs?What company did Greenwood establish to specialize in manufacturing his ear protectors?In what year did Chester Greenwood receive a patent for a revolving umbrella mechanism?How is the umbrella mechanism patent generally characterized compared to the earmuff invention?What other local business, outside of manufacturing stoves/earmuffs, did Greenwood own and operate?What location was Greenwood in when he experienced the discomfort leading to the earmuff invention?What major shift occurred in Greenwood's career trajectory following the initial success of the earmuffs?What is cited as the common professional trajectory for successful early inventors like Greenwood?If defining 'invented other things' strictly by holding multiple United States patents for novel mechanical devices, which item supports this claim for Greenwood?