Automatic window washing device

The ornamental design for an automatic window washing device, as shown and described.

FIG. 1 is a perspective view from the front of the automatic window washing device of my new design.

FIG. 2 is a perspective view from the rear of the device of my new design.

FIG. 3 is a front elevational view of the device of my new design.

FIG. 4 is a left end elevational view of the device of my new design.

FIG. 5 is a top plan view of the device of my new design.

FIG. 6 is a back elevational view of the device of my new design.

FIG. 7 is a right end elevational view of the device of my new design; and,

FIG. 8 is a bottom plan view of the device of my new design.

The broken line elements in FIG. 1 are environmental and form no part of the device of my new design.

Patent

Priority

Assignee

Title

Patent	Priority	Assignee	Title
1348443,
1661918,
1766550,
2563696,
3378875,
3454976,
3604049,
4025984,	Apr 02 1971	ROBERTSON-CECO CORPORATION, A DE CORP	Window wall washing device for high rise buildings
4136419,	May 02 1977	Alpana Aluminum Products, Inc.	Apparatus for cleaning a column of windows and wall surfaces of a building
4198724,	Jul 03 1978	Spider Staging, Inc.	Automatic window washer
4257138,	Jul 23 1979		Automatic device for washing windows
5655247,	May 26 1992	O.C.S. Group Limited	Window cleaning apparatus
6601256,	Jul 31 2000		Automatic cleansing device for outer wall and window-pane of building
6986186,	Feb 02 2004		Window washing system
7231683,	Sep 02 2003		Window cleaning apparatus
7823242,	May 29 2007		Remote controlled apparatus for cleaning of outer window surfaces of high rise buildings and building facades
20080295265,
D547911,	Apr 21 2006		Building window wiper

Executed on

Assignor

Assignee

Conveyance

Frame

Reel

Doc

n/a

Date	Maintenance Fee Events

n/a

Date	Maintenance Schedule