Inclination measuring instrument

Description

FIG. 1 is a front elevational view of an inclination measuring instrument showing my new design;

FIG. 2 is a bottom plan view;

FIG. 3 is a top plan view;

FIG. 4 is a right side elevational view;

FIG. 5 is a left side elevational view; and,

FIG. 6 is a front elevational view thereof, shown with the ruler element in an alternate condition of use.

Referenced Cited
U.S. Patent Documents
D306980 April 3, 1990 Pivovaroff
978525 December 1910 Werts
4394801 July 26, 1983 Thibadeaux
4442606 April 17, 1984 Graham et al.
4513512 April 30, 1985 Fisher
4660293 April 28, 1987 Kovacs
4745689 May 24, 1988 Hiltz
Other references
  • Hong Kong Enterprise, Time Ruler Calculators, Nov. 1987, p. 328, found in D10/62 Design Art Library.
Patent History
Patent number: D335634
Type: Grant
Filed: Jan 24, 1991
Date of Patent: May 18, 1993
Assignee: Techtronic Industries Co. Ltd. (New Territories)
Inventor: Tang K. Yau (Kowloon)
Primary Examiner: Alan P. Douglas
Assistant Examiner: Antoine D. Davis
Law Firm: Majestic, Parsons, Siebert & Hsue
Application Number: 7/645,283