Radio signal controlled laser beam interrupting ditch slope indicator

Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a front elevational view of the radio signal controlled laser beam interrupting ditch slope indicator showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a right side view thereof, the view from the opposite side being a mirror image;

FIG. 4 is a rear view thereof; and,

FIG. 5 is a bottom view thereof.

Referenced Cited
U.S. Patent Documents
D203873 February 1966 Kielhorn
D235527 June 1975 Dransfield
D236593 September 1975 Katayama
D259406 June 2, 1981 Jacobson
4490919 January 1, 1985 Feist et al.
Other references
  • Laser Instruments for Engineering Construction, from Spectra-Physics.
Patent History
Patent number: D283494
Type: Grant
Filed: Dec 27, 1983
Date of Patent: Apr 22, 1986
Inventor: Jimmy C. Simmons (Enid, OK)
Primary Examiner: Louis S. Zarfas
Attorney: Robert K. Rhea
Application Number: 6/565,669