RIGHT TRIANGLES AND TRIGONOMETRIC RATIOS
THE RIGHT KIND OF MEDICINE, SEE ALFRED HITCHCOCK PRESENTS. Chevrolet Motor RIGHT TRIANGLES AND TRIGONOMETRIC RATIOS. Calvin Productions. 29 min.. sd., b&w, 16 mm
Registration MP12099 No renewal found
- Term began
- 1961-04-28
- Claimant
- Calvin Productions, Inc
- Class
- MP — published motion picture other than a photoplay (numbering series begun Jan. 1950)
- Finding
- no renewal entry found for 1988-1990 or in the Copyright Office renewal records 1978-2025
- In the public domain since
- 1 January 1990 (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 1988 or 1989 volume; volumes searched: 1988, 1989, 1990.
The renewal sections are OCR text of printed volumes; a damaged record can hide a renewal. Before relying on this, search the linked volumes yourself for the title and for number MP12099.
Catalog entry
Catalog of Copyright Entries, Third Series, Parts 12–13: Motion Pictures, 1962, Internet Archive catalogofcopyr3161213libr (OCR text), lines 11491–11501.
THE RIGHT KIND OF MEDICINE, SEE ALFRED HITCHCOCK PRESENTS. Chevrolet Motor RIGHT TRIANGLES AND TRIGONOMETRIC RATIOS. Calvin Productions. 29 min.. sd., b&w, 16 mm. © Calvin Produc- tions, Inc.; 28Apr61; MP12099.
Copies on the Internet Archive
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