Patent Number: 6,311,322

Title: Program rewriting apparatus

Abstract: The normal program storing portion stores a normal program containing a control procedure of the program rewriting apparatus and a spare rewriting program. In a first period, the control device overwrites the received normal and spare rewriting programs on the normal program storing portion. In a second period different from the first period, the control device copies the spare rewriting program overwritten on the normal program storing portion to the rewriting program storing portion in accordance with the overwritten normal program.

Inventors: Ikeda; Takahiro (Tokyo, JP), Shirahata; Takuya (Yokohama, JP)

Assignee: Nikon Corporation

International Classification: G06F 11/14 (20060101); G06F 009/45 ()

Expiration Date: 10/30/2018