Inventor

NAKAYAMA HIROTOSHI

JP8 patents

⚠️ This page may combine multiple inventors who share the name “NAKAYAMA HIROTOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

RICOH CO LTD

3 patents

US10241308B2Mar 26, 2019

Projection optical system including movable lens groups and image display apparatus

RICOH CO LTD1 citations72

US11042082B2Jun 22, 2021

Projection optical system including movable lens groups, a non-movable lens group, and a curved mirror

RICOH CO LTD0 citations62

US9766438B2Sep 19, 2017

Projection optical system and image display apparatus including a refraction optical system and first and second reflecing surfaces

RICOH CO LTD0 citations51

TAKANO YOHEI

2 patents

US9261767B2Feb 16, 2016

Projection optical system and image display apparatus

TAKANO YOHEI5 citations83

US10890840B2Jan 12, 2021

Projection optical system unit, projection optical system, and projection optical apparatus

TAKANO YOHEI2 citations71

NAKAYAMA HIROTOSHI

2 patents

US8885232B2Nov 11, 2014

Scanner lens, image reader and image forming device

NAKAYAMA HIROTOSHI7 citations80

US8854701B2Oct 7, 2014

Image-forming lens, image reader, and image-forming device

NAKAYAMA HIROTOSHI1 citations48

NAKAMURA KASUMI

1 patent

US10725369B2Jul 28, 2020

Light source device and image display apparatus

NAKAMURA KASUMI0 citations38