The broken line showing of the ratchet structure is provided for purposes of environment and forms no part of the claimed design.
The broken line showing of the ratchet structure is provided for purposes of environment and forms no part of the claimed design.
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4227286 | Holmberg | Oct 1980 | A |
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Number | Date | Country | |
---|---|---|---|
Parent | 29648679 | May 2018 | US |
Child | 29723184 | US |