CA254294A - Sound projecting apparatus and method - Google Patents

Sound projecting apparatus and method

Info

Publication number
CA254294A
CA254294A CA254294A CA254294DA CA254294A CA 254294 A CA254294 A CA 254294A CA 254294 A CA254294 A CA 254294A CA 254294D A CA254294D A CA 254294DA CA 254294 A CA254294 A CA 254294A
Authority
CA
Canada
Prior art keywords
projecting apparatus
sound projecting
sound
projecting
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
CA254294A
Other languages
French (fr)
Inventor
Grissinger Elwood
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 CA254294A publication Critical patent/CA254294A/en
Expired legal-status Critical Current

Links

CA254294A Sound projecting apparatus and method Expired CA254294A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA254294T

Publications (1)

Publication Number Publication Date
CA254294A true CA254294A (en) 1925-10-06

Family

ID=35162844

Family Applications (1)

Application Number Title Priority Date Filing Date
CA254294A Expired CA254294A (en) Sound projecting apparatus and method

Country Status (1)

Country Link
CA (1) CA254294A (en)

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