The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 26, 2019
Filed:
May. 02, 2017
Applicant:
Ricoh Company, Ltd, Tokyo, JP;
Inventor:
Kazuyasu Ohashi, Chiba, JP;
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/17 (2006.01); G02B 15/163 (2006.01); G02B 15/24 (2006.01); G02B 15/26 (2006.01); G02B 7/00 (2006.01); G02B 7/02 (2006.01); H04N 5/232 (2006.01); H04N 7/18 (2006.01); G02B 13/00 (2006.01); H04N 5/225 (2006.01);
U.S. Cl.
CPC ...
G02B 15/17 (2013.01); G02B 7/008 (2013.01); G02B 7/028 (2013.01); G02B 13/009 (2013.01); G02B 15/163 (2013.01); G02B 15/24 (2013.01); G02B 15/26 (2013.01); H04N 5/2254 (2013.01); H04N 5/23296 (2013.01); H04N 7/18 (2013.01);
Abstract
A zoom lens unit includes, in order from an object side to an image side, a first lens group having positive refractive power and a focus function, a second lens group having negative refractive power, which moves when changing a magnification, a third lens group which moves when changing a magnification, and a fourth lens group having positive refractive power, which is fixed when changing a magnification, wherein the following condition (1) is fulfilled:||<0.14   (1)
Ohashi, Kazuyasu. (2019). Zoom lens unit, imaging device, and monitoring video camera (U.S. Patent No. 10215973). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10215973
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile