DgarApr 30, 2023
Show threadYour Future ExApr 30, 2023
@dgar Hmmm, how do you know the other end of the tube is not under water? Inhaling that kind of water Instead of some badly needed air must be an unpleasant experience
Show threadDgar

@yourfutureex
I would have to read the actual patent to answer those questions. @thomas posted this link to it in another comment.

https://worldwide.espacenet.com/patent/search/family/022895576/publication/US4320756A?q=US4320756

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Apr 30, 2023 at 11:31amWeb