A47C 7/287

With combinations of different types flat type tensioned springs

Official title: {with combinations of different types flat type tensioned springs}

A47C7/287 (With combinations of different types flat type tensioned springs) appears on 25 US grants and 18 published applications in this corpus.

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Granted patents
25
Published applications
18
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13
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44
Latest grant
7 Apr 2020

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