Tree stand rangefinder and method of using the same

Geometrical instruments – Straight-line light ray type – Vertical angle

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Details

33283, 33277, 356 20, G01C 312, G01C 310

Patent

active

054675316

ABSTRACT:
A hand held device adapted to be used by an archer situated in an elevated position to aid in the determination of the approximate ground distance to a stationary or moving target in a simple and efficient manner in order that he might thereby increase his chances of hitting the target.

REFERENCES:
patent: 1640425 (1927-08-01), Percival
patent: 2201230 (1940-05-01), Hardie
patent: 2279321 (1942-04-01), Janssen
patent: 2606367 (1952-08-01), Baumer
patent: 4120096 (1978-10-01), Keller
patent: 4974328 (1990-12-01), Lowry

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