Battery charging systems
US7944175B2 · kind B2 · utility
1,415Cited by
11References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2007 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Sep 7, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0049
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system for charging a power tool battery includes a charging device capable of charging a battery, a memory device capable of storing data of a plurality of sound patterns, a selecting device capable of selecting a sound pattern data from the plurality of sound patterns, and a sound generating device capable of generating a sound based on the selected sound pattern data when the charging operation of the battery by the charging device has been completed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.