ROTATING TRAPAZOIDAL WINDOW AND ITS APPLICATION TO AVIATION

ROTATING TRAPAZOIDAL WINDOW AND ITS APPLICATION TO AVIATION. Inwood Institute. © 1951. 200 ft., b&w, 16mm. Summary: Shows how the trapazoidal window may be used in teaching a new air crew trainee to rely on his instruments. Credits: Authors, Edward K. Hall, Jr., Christopher N. Rose

Registration MU5286 No renewal found

Term began: 1951-03-14
Claimant: Inwood Institute
Class: MU — unpublished motion picture other than a photoplay (numbering series begun 1946)
Finding: no renewal entry found for 1978-1980 or in the Copyright Office renewal records 1978-2025
In the public domain since: 1 January 1980 (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 1978 or 1979 volume; volumes searched: 1978, 1979, 1980.

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 MU5286.

Catalog entry

Catalog of Copyright Entries, Third Series, Parts 12–13: Motion Pictures, 1951, Internet Archive catalogofcopyri351213libr (OCR text), lines 16357–16368.

ROTATING TRAPAZOIDAL WINDOW AND 
ITS APPLICATION TO AVIATION. Inwood 
Institute. © 1951. 200 ft., b&w, 16mm. 

Summary: Shows how the trapazoidal 
window may be used in teaching a new air 
crew trainee to rely on his instruments. 

Credits: Authors, Edward K. Hall, Jr., 
Christopher N. Rose. 

© Inwood Institute; 14Mar51; MU5286.

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