G - Physics
10
K
84/43
G10K 9/04 (2006.01)
Patent
CA 1091489
Air Horn Abstract of the Disclosure A springless diaphragm-type air horn provided with fixed structure for controlling the amplitude of diaphragm oscilla- tion to thereby enable manufacturing of the horn without necessity for any adjustment of parts to achieve tone control.
306100
Macrae & Co.
Midland-Ross Corporation
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