US 6,032,313 · Granted 2000-03-07
Household appliance having plural coaxially rotatable or parallel linearly movable heads or tools
A household appliance of the type in which a cleaning, polishing, or massaging effect is obtained by a rotating head or tool is improved by splitting the cleaning, polishing, or massaging head or tool into concentric or parallel multiple heads or tools arranged for coaxial or side-by-side differential motion.
Patent details
- Publication number
- US 6,032,313
- Filing date
- 1997-05-06
- Grant date
- 2000-03-07
- Assignee
- Tsang; Koon Keung
- Inventor(s)
- TSANG; KOON KEUNG
- CPC class
- A47L11/40
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