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Class Information
Number: 315/53
Name: Electric lamp and discharge devices: systems > Combined load device or load device temperature modifying means and electrical circuit device structure > Plural circuit elements > Plural impedance elements > Diverse types of impedances
Description: Subject matter, wherein one of the impedance elements is of a diverse type with respect to another of the impedance elements.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6559578 |
Spark plug for an internal combustion engine |
May. 6, 2003 |
| 6300581 |
Christmas tree tip switch safety device |
Oct. 9, 2001 |
| 6288491 |
Metal halide lamp |
Sep. 11, 2001 |
| 5532557 |
Electric light socket constructions |
Jul. 2, 1996 |
| 5309062 |
Three-way compact fluorescent lamp system utilizing an electronic ballast having a variable frequency oscillator |
May. 3, 1994 |
| 5247228 |
Fluorescent lamp ballast adaptor |
Sep. 21, 1993 |
| 5185557 |
High-pressure discharge lamp |
Feb. 9, 1993 |
| 5136213 |
Motion detecting light controller system |
Aug. 4, 1992 |
| 5053676 |
High-pressure discharge lamp |
Oct. 1, 1991 |
| 5013969 |
Protective device for neutron tubes |
May. 7, 1991 |
| 4988921 |
Lamp with integral automatic light control circuit |
Jan. 29, 1991 |
| 4961027 |
Discharge lamp having a standardized base |
Oct. 2, 1990 |
| 4764708 |
Touch control lamp socket interior |
Aug. 16, 1988 |
| 4740873 |
Energy saving "U" shaped fluorescent lamp |
Apr. 26, 1988 |
| 4727289 |
LED lamp |
Feb. 23, 1988 |
| 4725759 |
Pilot lamp |
Feb. 16, 1988 |
| 4694215 |
Compact, single-ended fluorescent lamp with fill vapor pressure control |
Sep. 15, 1987 |
| 4647820 |
Discharge lamp ignition and supply circuit having a PTC resistor |
Mar. 3, 1987 |
| 4590407 |
Scale illumination lamp control circuit for an oscilloscope |
May. 20, 1986 |
| 4560906 |
Lighting system and compact electric lighting unit |
Dec. 24, 1985 |
| 4547704 |
Higher efficiency incandescent lighting units |
Oct. 15, 1985 |
| 4546290 |
Ballast circuits for discharge lamp |
Oct. 8, 1985 |
| 4449071 |
Fluorescent lamp device |
May. 15, 1984 |
| 4406969 |
Circular fluorescent lamp holder |
Sep. 27, 1983 |
| 4386296 |
Fluorescent light unit with dual light levels |
May. 31, 1983 |
| 4375607 |
Compact lamp unit having plug-in fluorescent lamp and module components |
Mar. 1, 1983 |
| 4367434 |
Lampholder fitting with three-way brightness solid-state fluorescent lamp ballast |
Jan. 4, 1983 |
| 4358710 |
Fluorescent light unit with dimmable light level |
Nov. 9, 1982 |
| 4358709 |
Fluorescent light unit with dual light levels |
Nov. 9, 1982 |
| 4337414 |
Compact fluorescent lamp having convoluted tubular envelope of tridimensional configuration, method of making such envelope, and lighting unit incorporating such lamp |
Jun. 29, 1982 |
| 4329625 |
Light-responsive light-emitting diode display |
May. 11, 1982 |
| 4300073 |
Screw-in type lighting unit having a convoluted tridimensional fluorescent lamp |
Nov. 10, 1981 |
| 4288725 |
Lightweight fluorescent lamp ballast |
Sep. 8, 1981 |
| 4284925 |
Multiple level dimming circuit for fluorescent lamp |
Aug. 18, 1981 |
| 4270071 |
Composite base and ballast member for compact single-ended fluorescent lamp |
May. 26, 1981 |
| 4224554 |
Spark plug having a low noise level |
Sep. 23, 1980 |
| 4211955 |
Solid state lamp |
Jul. 8, 1980 |
| 4178535 |
Three-way brightness fluorescent lampholder fitting |
Dec. 11, 1979 |
| 4173730 |
Compact fluorescent lamp unit having integral circuit means for DC operation |
Nov. 6, 1979 |
| 4163176 |
Energy saving fluorescent lamp |
Jul. 31, 1979 |
| 4159510 |
High-intensity lamp having high pulse repetition rate and narrow pulse-width |
Jun. 26, 1979 |
| 4144474 |
Low noise resistance containing spark plug |
Mar. 13, 1979 |
| 4134042 |
Electric discharge lamp control circuit having a temperature dependent capacitor |
Jan. 9, 1979 |
| 4117371 |
Electric device provided with a metal vapor discharge lamp |
Sep. 26, 1978 |
| 4082981 |
Energy saving device for a standard fluorescent lamp system |
Apr. 4, 1978 |
| 4020388 |
Discharge device |
Apr. 26, 1977 |
| 3975659 |
Lamp with an integrated flasher device |
Aug. 17, 1976 |
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