Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2011-03-15
2011-03-15
Kim, Paul D (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S025350, C029S592100, C029S609100, C310S311000, C310S31300R, C310S334000
Reexamination Certificate
active
07905007
ABSTRACT:
An acoustical stack for an ultrasound probe comprises a piezoelectric layer having top and bottom sides and a plurality of matching layer sections forming a matching layer structure. Each of the matching layer sections comprises a spring layer comprising a first material and a mass layer comprising a second material that is different than the first material. The spring layer within the matching layer section that is positioned closest to the piezoelectric layer is thinner than the spring layer within the other matching layer sections.
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patent: 4779020 (1988-10-01), Konno et al.
patent: 6822373 (2004-11-01), Butler
patent: 7573177 (2009-08-01), Fuller et al.
patent: 2008/0196971 (2008-08-01), Charbonnier et al.
patent: 2009/0219108 (2009-09-01), Zhao et al.
Baumgartner Charles
Calisti Serge Gerard
Gelly Jean-Francois
Lanteri Frederic
Smith Lowell
General Electric Company
Kim Paul D
Small Dean
The Small Patent Law Group
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