MEASUREMENT OF ELECTRICITY
MEASUREMENT OF ELECTRICITY. Coronet, 1949. 12 min., sd., b&w, 16mm. Summary: Defines the words volt, ampere, ohm, and watt, and illustrates the physical concepts involved. For junior high grades. } Credits; Educational collaborator, Ira C. Davis
Registration MP4215 No renewal found
- Term began
- 1949-02-25
- Claimant
- David A. Smart
- Class
- MP — published motion picture other than a photoplay (numbering series begun 1946)
- Finding
- no renewal entry found for 1976-1978 in the CCE motion-picture renewal sections or in the Copyright Office renewal records 1978-2025
- In the public domain since
- 1 January 1978 (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 1976 or 1977 volume; volumes searched: 1976, 1977, 1978.
Catalog entry
Catalog of Copyright Entries, Third Series, Parts 12–13: Motion Pictures, 1949, Internet Archive catalogofcopyri331213libr (OCR text), lines 7745–7757.
MEASUREMENT OF ELECTRICITY. Coronet, 1949. 12 min., sd., b&w, 16mm. Summary: Defines the words volt, ampere, ohm, and watt, and illustrates the physical concepts involved. For junior high grades. } Credits; Educational collaborator, Ira C. Davis. © David A. Smart; 25Feb49; MP4215,
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