Oral hygiene appliance
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jan 2, 2001
Grant Date -
N/A
app pub date -
Jul 21, 1999
filing date -
Jan 21, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An oral hygiene appliance has a spring-elastic working piece, comprising a stamped element made from foam, on the head of an handle. The stamped element is made from closed-cell foam, and only the cells located on the stamping face are opened by the stamping process.
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