@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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