Automatic volume and frequency controlled sound masking system

United States of America Patent

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Mar 20, 1984
Grant Date
N/A
app pub date
Apr 26, 1982
filing date
Apr 26, 1982

priority date (Note)
Expired

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Abstract

A sound masking system for generating background sound. The background sound is automatically adjusted to ambient noise levels by adjusting the amplitude of the frequency levels detected.

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Patent Owner(s)

Patent Owner	Address
LEUCADIA INC A CORP OF NEW YORK	315 PARK AVENUE SOUTH NEW YORK NY 10010

International Classification(s)

G10K:SOUND-PRODUCING DEVICES

[Classification Symbol]

[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Thomalla, Richard O	St. Paul, MN	1	42

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Automatic volume and frequency controlled sound masking system

Number of patents in Portfolio can not be more than 2000

United States of America Patent

06372033

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PATENT NO	4438526
SERIAL NO	06372033
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06372033

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