Resources Contact Us Home
Browse by Category: Main > Electrical & Energy
Class Information
Number: 315/258
Name: Electric lamp and discharge devices: systems > Pulsating or a.c. supply > Plural load device systems > Inductance in the supply circuit
Description: Systems provided with an inductance connected either in electrical series relation or electrical shunt relation to at least one of the load devices and the source of current supply.

Sub-classes under this class:

Class Number Class Name Patents
315/259 Variable inductance 6

Patents under this class:

Patent Number Title Of Patent Date Issued
5854539 Electroluminescent lamp driver circuit with signal tracking Dec. 29, 1998
5446350 Impedance matching circuit for an electrodeless fluorescent lamp ballast Aug. 29, 1995
5276385 High-pressure discharge lamp and lighting method Jan. 4, 1994
5036255 Balancing and shunt magnetics for gaseous discharge lamps Jul. 30, 1991
4996463 Auxiliary lighting system for high intensity discharge lamp Feb. 26, 1991
4931699 Ballast system including a starting aid for a gaseous discharge lamp Jun. 5, 1990
4902943 Plug-in starting aid Feb. 20, 1990
4654563 Fluorescent lamp ballast Mar. 31, 1987
4392089 Isolator for use with frequency responsive switching circuit Jul. 5, 1983
RE31146 Two-wire ballast for fluorescent tube dimming Feb. 8, 1983
4323823 Unitary ballast structure for operating four fluorescent lamps Apr. 6, 1982
4190790 Isolator circuit for use with frequency sensitive switching circuit Feb. 26, 1980
4163925 Two-wire ballast for fluorescent tube dimming Aug. 7, 1979
4123690 Discharge lamp ballast circuit Oct. 31, 1978
3997814 Discharge lamp lighting device Dec. 14, 1976
3991344 Solid-state dimmer for dual high pressure discharge lamps Nov. 9, 1976
3989976 Solid-state hid lamp dimmer Nov. 2, 1976
3931543 Starting and operating circuit for gaseous discharge lamps Jan. 6, 1976

  Recently Added Patents
Three-dimensional shape data processing apparatus and three-dimensional shape data processing method
Fixing apparatus
Performing failover for a plurality of different types of videoconferencing devices
Identifying conceptually related terms in search query results
X-ray imaging
Nitride semiconductor laser device
Switching element for a valve train of an internal combustion engine
  Randomly Featured Patents
Gantry arrangement for an industrial robot
Anode hooding system for a fused salt electrolytic cell
Coat rack
Method for laminating closure member to film web
Spirobenzoxazinium salts, method of use and compositions thereof as antihypertensive agents
Rim protector
Safety container
Floor level waste pumping system for toilets
System and method for displaying highest and lowest traded prices of tradable objects
Alignment optimization in image display systems employing multi-camera image acquisition