Patent
   D412454
Priority
Apr 16 1998
Filed
Apr 16 1998
Issued
Aug 03 1999
Expiry
Aug 03 2013
Assg.orig
Entity
unknown
6
3
n/a
The ornamental design for sight glass for sprinkler system lines, as shown and described.

FIG. 1 is a left front perspective view of an embodiment of a sight glass for sprinkler system lines showing my new design;

FIG. 2 is a front view thereof, the opposite side being the mirror image thereof;

FIG. 3 is a left end view thereof;

FIG. 4 is a right end view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a left front perspective view of a second embodiment of the design;

FIG. 7 is a front view thereof, the opposite side being the mirror image thereof;

FIG. 8 is an left end view thereof;

FIG. 9 is a right end view thereof; and,

FIG. 10 is a bottom view thereof.

Berkelhammer, Michael A.

Patent Priority Assignee Title
6499439, Jun 15 2001 Triad Metal Products Company Modular stamped sight glass assembly
D520392, Sep 01 2004 ARNO, MICHAEL J Inline, point-of-use air/gas dryness indicator
D606437, Jul 22 2008 Danfoss Tianjin Ltd. Sight glass applied in refrigeration system
D606438, Jul 22 2008 Danfoss Tianjin Ltd. Sight glass applied in refrigeration system
D606439, Jul 22 2008 Danfoss Tianjin Ltd. Sight glass applied in refrigeration system
D845161, Aug 03 2016 VEGA Grieshaber KG Fill level measuring device
Patent Priority Assignee Title
4788929, Jun 14 1988 Parker Intangibles LLC Fluid indicator for refrigeration system
D256000, Apr 07 1978 Mobil Oil AB Sweden Fluid flow indicator
D315526, Jul 07 1988 Amoco Corporation Flow indicator for a fuel dispenser
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Apr 06 1998BERKELHAMMER, MICHAEL A UNITED BRASS WORKS, INC ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0091760344 pdf
Apr 16 1998United Brass Works, Inc.(assignment on the face of the patent)
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