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Class Information
Number: 307/66
Name: Electrical transmission or interconnection systems > Plural supply circuits or sources > Substitute or emergency source > Storage battery or accumulator
Description: Subject matter in which a substitute or emergency source is a storage battery.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7615965 |
Power management system |
Nov. 10, 2009 |
| 7615891 |
Systems for and methods of controlling operation of a UPS |
Nov. 10, 2009 |
| 7615890 |
Methods and apparatus for providing uninterruptible power |
Nov. 10, 2009 |
| 7615889 |
Modular cell site |
Nov. 10, 2009 |
| 7612468 |
Uninterruptible power supply device with circuit for degradation judgment of storage battery |
Nov. 3, 2009 |
| 7609031 |
Method for balancing lithium secondary cells and modules |
Oct. 27, 2009 |
| 7608944 |
Battery connect/disconnect for an uninterruptible power supply |
Oct. 27, 2009 |
| 7602082 |
Backup time endorsed power supply apparatus |
Oct. 13, 2009 |
| 7592717 |
Power mains data transfer system |
Sep. 22, 2009 |
| 7589437 |
Control unit in a vehicle |
Sep. 15, 2009 |
| 7589436 |
Data processing unit and DC backup power supply |
Sep. 15, 2009 |
| 7582987 |
Double power sources switching circuit |
Sep. 1, 2009 |
| 7577005 |
Method for recognizing the load of an island inverter and island inverter |
Aug. 18, 2009 |
| 7573156 |
Apparatus for and method of connecting a power source to a device |
Aug. 11, 2009 |
| 7573154 |
Battery operated portable electronic device having dual batteries |
Aug. 11, 2009 |
| 7567060 |
System and method for advanced power management |
Jul. 28, 2009 |
| 7564148 |
UPS having a dual-use boost converter |
Jul. 21, 2009 |
| 7561411 |
Uninterruptible power distribution systems and methods using distributed power distribution units |
Jul. 14, 2009 |
| 7560907 |
Charging system for field devices |
Jul. 14, 2009 |
| 7560832 |
Power supply and related systems and methods |
Jul. 14, 2009 |
| 7557531 |
Power system utilizing flow batteries |
Jul. 7, 2009 |
| 7554276 |
Protection circuit for permanent magnet synchronous motor in field weakening operation |
Jun. 30, 2009 |
| 7550873 |
Uninterruptible power supply for home/office networking and communication system |
Jun. 23, 2009 |
| 7547990 |
Backup power system for electrical appliances |
Jun. 16, 2009 |
| 7541776 |
Method and system for operating a portable electronic device in a power-limited manner |
Jun. 2, 2009 |
| 7541695 |
Uninterruptible power supply with low power loss |
Jun. 2, 2009 |
| 7541694 |
Time limit circuit for a hold-up battery |
Jun. 2, 2009 |
| 7538530 |
Buck converter |
May. 26, 2009 |
| 7538451 |
Power supply system and electronic device |
May. 26, 2009 |
| 7535119 |
Power control apparatus of a complex terminal |
May. 19, 2009 |
| 7531916 |
Protection circuits for hybrid power systems |
May. 12, 2009 |
| 7528734 |
System and method for automatically detecting power supply voltage |
May. 5, 2009 |
| 7521823 |
Uninterruptible power supply |
Apr. 21, 2009 |
| 7521822 |
Protection techniques for a back-up electric power system |
Apr. 21, 2009 |
| 7520072 |
Exit signs with and without emergency lighting |
Apr. 21, 2009 |
| 7518342 |
Apparatus and method for effecting power distribution to a host system from a voltage source or a battery |
Apr. 14, 2009 |
| 7518265 |
On-demand uninterruptible power supply |
Apr. 14, 2009 |
| 7514817 |
Converting device with power factor correcting and dc/dc converting functions |
Apr. 7, 2009 |
| 7511389 |
Emergency electric power supply unit |
Mar. 31, 2009 |
| 7502233 |
DC power supply using either AC or DC input for both |
Mar. 10, 2009 |
| 7501768 |
Equipment and methods for emergency lighting that provides brownout detection and protection |
Mar. 10, 2009 |
| 7501720 |
Selector circuit for power management in multiple battery systems |
Mar. 10, 2009 |
| 7498692 |
Power over ethernet battery backup |
Mar. 3, 2009 |
| 7495415 |
DC backup power supply system |
Feb. 24, 2009 |
| 7492057 |
High reliability DC power distribution system |
Feb. 17, 2009 |
| 7486033 |
Lighting device |
Feb. 3, 2009 |
| 7485988 |
Uninterruptible power supply |
Feb. 3, 2009 |
| 7476988 |
Power stealing control devices |
Jan. 13, 2009 |
| 7471061 |
Method and apparatus for extending battery life in regulated voltage applications |
Dec. 30, 2008 |
| 7463500 |
Monopolar DC to bipolar DC to AC converter |
Dec. 9, 2008 |
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