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This application is also related to co-pending U.S. application Ser. No. 29/275,260, filed Dec. 19, 2006.
The broken lines shown represent unclaimed subject matter and form no part of the claimed design.
The ornamental design for an electrical transformer, as shown and described.
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- ABB Inc., Power Transformers, 2003, 11 pgs.
- ASA Trafobau GmbH, 24 pgs. — Date unknown.
- Koncar—Distributivni i Specijalni Transformatori d.d., Power Transformers (3,2) V 01, 8 pgs. — Date unknown.
- SGB Starkstrom and SMIT Transformers, Partners in Power, 6 pgs. — Date unknown.
- MF Transformatori srl, Oil Filled Transformer, 14 pgs., Date unknown.
Filed: May 5, 2009
Date of Patent: Apr 13, 2010
Assignees: ABB T&D Technology, Ltd. (Zurich), ABB Technology AG (Zurich)
Inventors: Sigurdur Thorsteinsson (Milan), Egil Stryken (Solbergelva), Richard Tinggren (Thalwil)
Primary Examiner: Prabhakar Deshmukh
Assistant Examiner: Derrick Holland
Attorney: Connolly Bove Lodge & Hutz LLP
Application Number: 29/336,557