Laser level

Geometrical instruments – Straight-line light ray type – Alignment device

Reexamination Certificate

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Details

C033S291000

Reexamination Certificate

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06964106

ABSTRACT:
An improved laser level has a housing and a first shaft connected to the housing. Two bearings are disposed on the first shaft. A gimbal body is disposed on the two bearings. A second shaft is connected to the gimbal body. A third bearing is disposed on the second shaft. A pendulum is disposed on the third bearing. A laser diode is disposed on the pendulum.

REFERENCES:
patent: 3241243 (1966-03-01), Speer
patent: 5539990 (1996-07-01), Le
patent: 5912733 (1999-06-01), Dunlop et al.
patent: 6792685 (2004-09-01), Ng et al.
patent: 2003/0029049 (2003-02-01), Huang et al.

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