Large relative aperture objective lens. Kato, M. & Hashimoto, S. November 1985.
Paper bibtex @patent{kato_large_1985,
title = {Large relative aperture objective lens},
url = {https://patents.google.com/patent/US4553823A/en},
nationality = {US},
assignee = {Canon Inc},
number = {US4553823A},
urldate = {2022-09-29},
author = {Kato, Masatake and Hashimoto, Shigeru},
month = nov,
year = {1985},
keywords = {component, focusing, lens, movement, relative aperture},
}
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