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Patent
   D550155
Priority
Nov 12 2003
Filed
Dec 19 2006
Issued
Sep 04 2007
Expiry
Sep 04 2021
Inventors
Thorsteins…
Assg.orig
ABB Techno…
Assg.curr
ABB Schwei…
Entity
unknown
Referenced by
0
References
14
Maint.:
n/a
The ornamental design for an electrical transformer, as shown and described.

FIG. 1 is a front view of an electrical transformer;

FIG. 2 is a top view of said electrical transformer;

FIG. 3 is a side view of said electrical transformer; and,

FIG. 4 is a perspective view of said electrical transformer.
INVENTORS:

Thorsteinsson, Sigurdur, Stryken, Egil, Tinggren, Richard

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
2947957,
3479563,
3781741,
4027279, Jul 21 1975 Device for attaching leads to a transformer or the like
4257027, Nov 27 1978 Shimoda Electric Company Transformer bobbin assembly
6185811, Sep 06 1996 Hammond Manufacturing Company Method for making a transformer
188248,
188249,
202045,
D257342, Dec 11 1978 Electrical transformer
D259040, Apr 27 1978 General Electric Company Vaporization cooled transformer or similar article
D290456, Dec 27 1983 Marelco Power Systems, Inc. Transformer
D294565, Mar 30 1984 Sangamo Weston, Inc. Voltage transformer
D324371, Jul 11 1988 Societe pour l'Application de l'Optique et de l'Electronique a la Electric transformer
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Dec 19 2006ABB Technology AG(assignment on the face of the patent)
May 09 2016ABB Technology LtdABB Schweiz AGMERGER SEE DOCUMENT FOR DETAILS 0406210633 pdf
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