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. 05, 2012
Filed:
Mar. 10, 2010
David A. Kitchin, Laurel, MD (US);
Charles W. Kerechanin, Ii, Burtonsville, MD (US);
Juan I. Arvelo, Jr., Dayton, MD (US);
Ronald W. Mitnick, Baltimore, MD (US);
David A. Kitchin, Laurel, MD (US);
Charles W. Kerechanin, II, Burtonsville, MD (US);
Juan I. Arvelo, Jr., Dayton, MD (US);
Ronald W. Mitnick, Baltimore, MD (US);
The John Hopkins University, Baltimore, MD (US);
Abstract
A hydrophone unit comprising a resilient central wire; a conductive wire coiled around the resilient central wire, said conductive wire being coated with a piezo material for generating an electrical signal in response to the presence of an acoustic vibration, wherein the resilient central wire is fabricated from spring steel, the conductive wire is a copper wire, the piezo material includes polyvinylidene difluoride; a layer of conductive material deposited on the piezo material-coated conductive wire, wherein the layer of conductive material comprises a silver ink; and a jacket of polyurethane.