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Combination spherical whistle

Signals and indicators – Horns – whistles and compressional wave generators
Reexamination Certificate

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Combination whistle

Signals and indicators – Horns – whistles and compressional wave generators
Patent

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Combined personal identification, safety, and convenience device

Signals and indicators – Horns – whistles and compressional wave generators
Patent

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Combined safety whistle with article holding means

Signals and indicators – Horns – whistles and compressional wave generators
Patent

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Combined whistle and environmental instruments

Signals and indicators – Horns – whistles and compressional wave generators
Patent

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Device for generating sound waves at relatively high frequencies

Signals and indicators – Horns – whistles and compressional wave generators
Patent

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Disassemblable whistle

Signals and indicators – Horns – whistles and compressional wave generators
Reexamination Certificate

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Emergency whistle

Signals and indicators – Horns – whistles and compressional wave generators
Patent

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Flexible instrument pointer

Signals and indicators – Horns – whistles and compressional wave generators – Manually actuated air compressor
Patent

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Fluidic frequency generator

Signals and indicators – Horns – whistles and compressional wave generators
Patent

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Game position monitoring device

Signals and indicators – Horns – whistles and compressional wave generators – Manually actuated air compressor
Patent

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Handheld warning device

Signals and indicators – Horns – whistles and compressional wave generators – Manually actuated air compressor
Patent

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High acoustic output horn

Signals and indicators – Horns – whistles and compressional wave generators – Diaphragm horns
Patent

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Horn

Signals and indicators – Horns – whistles and compressional wave generators – Diaphragm horns
Patent

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Horn flare

Signals and indicators – Horns – whistles and compressional wave generators
Patent

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Horn for sportfans

Signals and indicators – Horns – whistles and compressional wave generators – Diaphragm horns
Patent

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Horn for use in transmitting ultrasonic vibrations

Signals and indicators – Horns – whistles and compressional wave generators
Patent

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Impulse noise generator

Signals and indicators – Horns – whistles and compressional wave generators
Patent

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Information display device

Signals and indicators – Horns – whistles and compressional wave generators – Manually actuated air compressor
Patent

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Intense noise generator

Signals and indicators – Horns – whistles and compressional wave generators
Patent

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