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905855 Ideal Self-Supporting Horn
Posted: Sat Feb 05, 2022 7:33 am
by JohnM
Patented by the inventor of the Biophone!
Re: Ideal Self-Supporting Horn
Posted: Sat Feb 05, 2022 10:48 pm
by Lucius1958
And an example here on the forum:
viewtopic.php?f=2&t=37201
- Bill
Re: Ideal Self-Supporting Horn
Posted: Sat Feb 05, 2022 11:19 pm
by Mlund2020
Devineau Biophone with Devineau Ideal Self Supporting Horn
Re: Ideal Self-Supporting Horn
Posted: Sun Feb 06, 2022 4:34 am
by JohnM