2003-180587 is referenced by 103 patents.

PROBLEM TO BE SOLVED: To provide a self-propelled cleaner with detachable units that automatically cleans up by self-propelled cleaners with a plurality of varied capabilities linking and cooperating with each other.SOLUTION: The self-propelled cleaner is composed of a first cleaner provided with at least a cleaning device and a moving device and one or more of a second cleaner. The first cleaner is characterized by its storing device for storing the second cleaner or at least a part of it inside.

Title
Electric cleaner with detachable unit
Application Number
2001-385732
Publication Number
2003-180587
Application Date
December 19, 2001
Publication Date
July 2, 2003
Inventor
Kawase Yoshitaka
Akiyama Osamu
Numano Masabumi
Tatsuoka Masao
Inoue Takashi
Assignee
Sharp
IPC
A47L 09/00
A47L 09/28