Optical automatic level

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Description

FIG. 1 is a perspective view of an optical automatic level showing our new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a front elevational view thereof.

The bottom surfaces of the optical automatic levels are not part of the design sought to be patented and are therefore not shown. The portions of the optical automatic levels shown in broken lines are not part of the design sought to be patented.

Claims

The ornamental design for an optical automatic level, as shown and described.

Referenced Cited
U.S. Patent Documents
4794701 January 3, 1989 Clark
4947556 August 14, 1990 Pell
5900931 May 4, 1999 Rando
Other references
  • Sokkia Measuring Systems Catalog pp. 32A, 33A, 37A, and 38A.
  • David White Construction lasers & Optical Instruments Catalog, pp. 3, 4, 12, 13, 14 and 15.
  • 1998-1999 CST/Berger Contractors Supply Catalog, p. 5.
  • 1998 SECO Manufacturing Co., Inc. Surveying & GPS Accessories brochure, p. 10.
  • TOPCON, Auto Level At-GSeries brochure.
Patent History
Patent number: D440506
Type: Grant
Filed: Feb 18, 2000
Date of Patent: Apr 17, 2001
Assignee: David White, L.L.C. (Germantown, WI)
Inventors: Torsten J. R. Blaetter (Oshkosh, WI), Alan D. Bengtson (Shorewood, WI), Casey A. Ketterhagen (Milwaukee, WI)
Primary Examiner: Antoine Duval Davis
Attorney, Agent or Law Firm: Michael Best & Friedrich LLP
Application Number: 29/118,957
Classifications
Current U.S. Class: Spirit Level (D10/69)
International Classification: 1004;