Thread Number: 40847  /  Tag: 50s/60s/70s Vacuum Cleaners
Hoover clip on plug patent expiration year
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Post# 433959   10/22/2020 at 14:06 by 2011hoover700 (owosso michigan)        

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Hi I'm wondering when hoover's clip on plug patent expired.
Thanks for shining some light on that subject.

Post# 433965 , Reply# 1   10/22/2020 at 15:23 by dysonman1 (Rolla, MO)        

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Without knowing when it was patented, but knowing patents expire in 18 years, the first Hoover I know of with the clip on plug was the 150 of 1936. So by 1954, the patent would have been expired. I've seen mid century vacuums with clip on plugs, so that would be about right.

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