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The ornamental design for an electric safety switch, as shown and described. |
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FIG. 1 is a perspective view of an electric safety switch showing my new design;
FIG. 2 is a first side elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a second side elevational view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a rear elevational view thereof; and
FIG. 7 is a front elevational view thereof.
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| D823267, | Jun 30 2017 | Ningbo Dooya Mechanic & Electronic Technology Co., Ltd. | Switch |
| ER8635, | |||
| ER9968, |
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| D246241, | Apr 05 1976 | JDS Products, Inc. | Combination plug and power cut-off unit |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Dec 10 1987 | MAASS, RUDOLF | ROBERT KRUPS STIFTUNG & CO KG , HERESBACHSTRASSE 29, D-5650 SOLINGEN 19, FEDERAL REPUBLIC GERMANY, A COMPANY OF GERMANY | ASSIGNMENT OF ASSIGNORS INTEREST | 004805 | /0681 | |
| Dec 17 1987 | Robert Krups Stiftung & Co. KG. | (assignment on the face of the patent) | / |
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