Title:
Zoom lens for projection and image display device
Document Type and Number:
Japanese Patent JP6303376
Kind Code:
B2
Inventors:
Kubota Takashi
Application Number:
JP2013209646A
Publication Date:
April 04, 2018
Filing Date:
October 04, 2013
Export Citation:
Assignee:
株式会社リコー
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| JP11295599A | ||||
| JP7049453A | ||||
| JP2004226510A | ||||
| JP2008145639A | ||||
| JP2003149552A | ||||
| JP2004037966A | ||||
| JP2007286233A |
Foreign References:
| US6108136 | ||||
| US20040080632 | ||||
| US20070242366 |
Attorney, Agent or Firm:
Shuichi Kudo