Search formula for IPC is to input in the Line I.

Format: IPC is 12 alphanumeric string：ANNANNNNNNNN

A can be A--H， N can be 0--9。

when inputting IPC，":" and "/" in original format should be erased.

Format:	original IPC format	format should be used
	C07D279:00	C07D27900
	C07D513/04	C07D51304
	C07D205:00	C07D20500
	C23C 10/50	C23C01050
	A47J 27/66	A47J02766

A complete IPC Group should be 3-digit long. To input an IPC up to group, leading zero(s) are needed,

for example:    C01B00230 means C01B  2/30.

Right trancation can be used for search in an interval.

For Example: A47B0 indicates from A47B0000000 to A47B0999999

For a complicated search in which more than one application number is involved, boolean operators, "+', "*" and "-", can be used.

For Example:	C07D002*(C05D002+C05D003-C06C)

If search in this entry is carried out successfully, the hits will be shown at the most right column of this line, otherwise the error message will be shown instead.