Philips Sues Gillette Over Electric Toothbrush Patent
The lawsuits, filed in the U.S. District Court for the District of Delaware and the Landesgericht Dusseldorf in Germany, accuses Gillette of infringing Phillips “patented sonic technology.”
Both products have heads that move back and forth rather than circularly and emit a characteristic buzzing sound.
Philips' sonic technology was granted patents in the US in 1995 and in...
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