Inventor

KUMADA NOBUTAKA

JP2 patents

Patents

2 patents

US6842301B2Jan 11, 2005

ND filter and aperture device including the same

NISCA CORP7 citations68

US6842302B2Jan 11, 2005

ND filter, method for producing the ND filter, and aperture device including the ND filter

NISCA CORP8 citations68