The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 27, 1978
Filed:
Feb. 10, 1977
Applicant:
Inventors:
Parvin Riddle, Annapolis, MD (US);
Christopher I Reynolds, Walpole, MA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S / ;
U.S. Cl.
CPC ...
340 / ;
Abstract
An audible tone depth sounder indicator apparatus changes the repetition rate of its audio output to indicate deviation in actual water depth from a selected reference depth. A change in tone of the audible output distinguishes positive and negative deviations from the reference depth, and there is no audible signal when actual depth equals the selected reference depth.