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H01K9/02
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H
ELECTRICITY
H01
Electric elements
H01K
ELECTRIC INCANDESCENT LAMPS
H01K9/00
Lamps having two or more incandescent bodies separately heated
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H01K9/02
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Patents Grants
last 30 patents
Information
Patent Grant
Light bulb and method of use
Patent number
7,804,233
Issue date
Sep 28, 2010
Shaam P. Sundhar
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Incandescent lamp with an improved filament implementation
Patent number
5,384,510
Issue date
Jan 24, 1995
Bruce H. Arnold
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Two filament electric bulb traffic light
Patent number
3,968,395
Issue date
Jul 6, 1976
Siemens Aktiengesellschaft
Anton Obermaier
G08 - SIGNALLING
Information
Patent Grant
3673534
Patent number
3,673,534
Issue date
Jun 27, 1972
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
2448493
Patent number
2,448,493
Issue date
Aug 31, 1948
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
2405789
Patent number
2,405,789
Issue date
Aug 13, 1946
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
2241935
Patent number
2,241,935
Issue date
May 13, 1941
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
2060637
Patent number
2,060,637
Issue date
Nov 10, 1936
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
1742630
Patent number
1,742,630
Issue date
Jan 7, 1930
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
1523362
Patent number
1,523,362
Issue date
Jan 13, 1925
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
1468264
Patent number
1,468,264
Issue date
Sep 18, 1923
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
1456568
Patent number
1,456,568
Issue date
May 29, 1923
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
1437723
Patent number
1,437,723
Issue date
Dec 5, 1922
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
1436807
Patent number
1,436,807
Issue date
Nov 28, 1922
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
1433807
Patent number
1,433,807
Issue date
Oct 31, 1922
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
1298179
Patent number
1,298,179
Issue date
Mar 25, 1919
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
1259907
Patent number
1,259,907
Issue date
Mar 19, 1918
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
511229
Patent number
511,229
Issue date
Dec 19, 1893
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
339253
Patent number
339,253
Issue date
Apr 6, 1886
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
273366
Patent number
273,366
Issue date
Mar 6, 1883
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
261503
Patent number
261,503
Issue date
Jul 18, 1882
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
259763
Patent number
259,763
Issue date
Jun 20, 1882
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
166877
Patent number
166,877
Issue date
Aug 17, 1875
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents