neither pole becoming electrically connected until the coupling parts are substantially engaged

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Patents Grantslast 30 patents

Information Patent Grant
Safety lampholder and method for avoiding accidental electric shock...
- Patent number 7,381,070
- Issue date Jun 3, 2008
- Mass Technology (H.K.) Ltd.
- Onn Fah Foo
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Protective lampholder for bayonet base lamp
- Patent number 4,461,523
- Issue date Jul 24, 1984
- North American Philips Corporation
- George Ustin
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
2857570
- Patent number 2,857,570
- Issue date Oct 21, 1958
- G01 - MEASURING TESTING
Information Patent Grant
2787676
- Patent number 2,787,676
- Issue date Apr 2, 1957
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
2127473
- Patent number 2,127,473
- Issue date Aug 16, 1938
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
1774230
- Patent number 1,774,230
- Issue date Aug 26, 1930
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
1753179
- Patent number 1,753,179
- Issue date Apr 1, 1930
- H01 - BASIC ELECTRIC ELEMENTS