Geometrical instruments – Straight-line light ray type – Horizontal angle measurer
Reexamination Certificate
2006-02-14
2006-02-14
Fulton, Christopher W. (Department: 2859)
Geometrical instruments
Straight-line light ray type
Horizontal angle measurer
C033S227000, C033S283000
Reexamination Certificate
active
06996910
ABSTRACT:
A laser leveling device includes a laser instrument having a base rotatably received in a cavity of a housing and having a light emitting device to generate a light beam, such as a line-shaped light beam. One or more batteries may be used to energize the light emitting device. The light beam generated by the light emitting device may be rotated relative to the housing when the light emitting device of the laser instrument is rotated relative to the housing. The housing includes two conductors, and the laser instrument includes two terminals to electrically couple to the conductors of the housing when the laser instrument is rotated relative to the housing.
REFERENCES:
patent: 5539990 (1996-07-01), Le
patent: 5621975 (1997-04-01), Rando
patent: 5864956 (1999-02-01), Dong
patent: 5971810 (1999-10-01), Taylor
patent: 6739062 (2004-05-01), Jan et al.
patent: 2001/0037579 (2001-11-01), Akers
Baxley Charles E.
Courson Tania
Fulton Christopher W.
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