CA842585A - Sound muting and filtering device - Google Patents

Sound muting and filtering device

Info

Publication number
CA842585A
CA842585A CA842585A CA842585DA CA842585A CA 842585 A CA842585 A CA 842585A CA 842585 A CA842585 A CA 842585A CA 842585D A CA842585D A CA 842585DA CA 842585 A CA842585 A CA 842585A
Authority
CA
Canada
Prior art keywords
filtering device
sound muting
muting
sound
filtering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA842585A
Inventor
S. Everett Wilhelm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA842585A publication Critical patent/CA842585A/en
Expired legal-status Critical Current

Links

CA842585A Sound muting and filtering device Expired CA842585A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA842585T

Publications (1)

Publication Number Publication Date
CA842585A true CA842585A (en) 1970-05-26

Family

ID=36326788

Family Applications (1)

Application Number Title Priority Date Filing Date
CA842585A Expired CA842585A (en) Sound muting and filtering device

Country Status (1)

Country Link
CA (1) CA842585A (en)

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