Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HOSOKAWA KATSUPANSHO KK
Original Assignee
HOSOKAWA KATSUPANSHO KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HOSOKAWA KATSUPANSHO KKfiledCriticalHOSOKAWA KATSUPANSHO KK
Priority to JP58196724ApriorityCriticalpatent/JPS6087380A/ja
Publication of JPS6087380ApublicationCriticalpatent/JPS6087380A/ja
Publication of JPH0332794B2publicationCriticalpatent/JPH0332794B2/ja
G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
G03G21/04—Preventing copies being made of an original
G03G21/043—Preventing copies being made of an original by using an original which is not reproducible or only reproducible with a different appearence, e.g. originals with a photochromic layer or a colour background