Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Reexamination Certificate
2011-01-11
2011-01-11
Fulton, Christopher W (Department: 2841)
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
C033S451000, C033S350000
Reexamination Certificate
active
07866055
ABSTRACT:
The present invention provides a level having a body which has a first end, a second end opposed to the first end, and a plane surface which connects the first and second ends, at least one level indicating device mounted to the body, and two end caps which are mounted onto the first and second ends, respectively. Each end cap has an outer end which is distributed by a plurality of resilient portions with small surface area for absorbing impact if the level is accidentally dropped or impacted.
REFERENCES:
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patent: 4463501 (1984-08-01), Wright et al.
patent: 5709034 (1998-01-01), Kohner
patent: 6675490 (2004-01-01), Krehel et al.
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patent: 7073270 (2006-07-01), Kim
patent: 7552540 (2009-06-01), Ming
patent: 2010/0000105 (2010-01-01), Zhang et al.
Chen Ming
Shuang Jianjun
Zhang Yuexiang
Chervon Limited
Fulton Christopher W
McDermott Will & Emery LLP
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