FUNDAMENTALS OF ACOUSTICS
s; portrays the mechanics of the hearing process; explains the range of the human voice; reveals the effects of eliminating vibrational frequencies, and identifies ultrasonics. For high school, college, and adult groups. Credits: Educational collaborators, John Wilkinson, Heinz R. Paneth, E. F. Fahy
Registration MP1153 No renewal found
- Term began
- 1950-12-29
- Claimant
- Encyclopaedia Britannica Films Inc
- Class
- MP — published motion picture other than a photoplay (numbering series begun Jan. 1950)
- Finding
- no renewal entry found for 1977-1979 in the CCE motion-picture renewal sections or in the Copyright Office renewal records 1978-2025
- In the public domain since
- 1 January 1979 (end of the 28th year, no renewal)
A renewal would have appeared in the Copyright Office's renewal registrations 27 to 29 years after the term began. Those volumes are loaded and no matching renewal was found. A work published 1931–1963 that was not renewed entered the public domain at the end of its 28th year.
A renewal had to be filed in the 28th year and would be listed in the 1977 or 1978 volume; volumes searched: 1977, 1978, 1979.
Catalog entry
Catalog of Copyright Entries, Third Series, Parts 12–13: Motion Pictures, 1951, Internet Archive catalogofcopyri351213libr (OCR text), lines 6226–6238.
of sounds; portrays the mechanics of the hearing process; explains the range of the human voice; reveals the effects of elim- inating vibrational frequencies, and iden- tifies ultrasonics. For high school, college, and adult groups. Credits: Educational collaborators, John Wilkinson, Heinz R. Paneth, E. F. Fahy. © Encyclopaedia Britannica Films Inc.; 29Dec50; MP1153.
Copies on the Internet Archive
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