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Daniel W. O'Brien Patents |
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Inventor: O'Brien; Daniel W.
Address: Mooresville, IN
No. of patents: 2
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 6987445 |
Water resistant audible signal |
January 17, 2006 |
| The invention is an modified audible signal, such as a piezoelectric noise-making and audible signaling device, which further includes a hydrophobic covering material, such as polytetrafluoroethylene (PTFE). The hydrophobic covering material is known to be water resistant, but does n |
| 5872506 |
Piezoelectric transducer having directly mounted electrical components and noise making device u |
February 16, 1999 |
| The invention is an improved noise-making device using a piezoelectric transducer where electrical circuit components are mounted directly on the transducer itself rather than being mounted on a separate printed circuit board. Directly mounting the components eliminates the need for a se |
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