Three-phase ring transformer core

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Description

The FIGURE is a perspective view of a three-phase ring transformer core showing my new design.

Claims

The ornamental design for a three-phase ring transformer core, as shown and described.

Referenced Cited
U.S. Patent Documents
2248606 January 1941 Camilli
2838732 June 1958 Brown
4588971 May 13, 1986 Beisser
4639705 January 27, 1987 Beisser
4852246 August 1, 1989 Rochester
Foreign Patent Documents
40 29 097 March 1992 DE
57-124408 August 1982 JP
61-036914 February 1986 JP
Patent History
Patent number: D454839
Type: Grant
Filed: Sep 2, 1998
Date of Patent: Mar 26, 2002
Inventor: Lennart Harry Erik Höglund (S-589 23 Linköping)
Primary Examiner: Joel Sincavage
Attorney, Agent or Law Firms: D. Peter Hochberg, Katherine R. Vieyra, William H. Holt
Application Number: 29/093,087
Classifications
Current U.S. Class: Element Or Attachment (D13/118)
International Classification: 1302;