Patrick J Gwin, 452635 Larick Dr, Marion, IA 52302

2012018, Jul 19, 2012

Dec 8, 2011

13/314855

Frans Lautzenhiser - Zionsville IN, US
Alex Mezheritsky - Zionsville IN, US
Patrick E. Gwin - Indianapolis IN, US
Steven T. Morris - Indianapolis IN, US
Richard W. Smith - Richland WA, US
Brian E. Atkinson - Fishers IN, US

G01S 15/88

367 87

A method for identifying a warhead in an aircraft launch tube includes providing a pattern of grooves on the surface of a warhead, with the pattern of grooves being associated with an identification code identifying the warhead or a characteristic of it, providing the warhead in an aircraft launch tube, providing a piezoelectric transducer on the launch tube, emitting an ultrasonic wave from the piezoelectric transducer to the pattern of grooves, where the wave encounters the pattern of grooves at an angle of less than 90 so that waves striking the interior of a groove are reflected back to the transducer as echo waves, while waves not striking the interior of a groove are reflected away from the transducer, and reading the pattern of returning echo waves to determine the identification code indicated by the pattern of grooves on the warhead.

2004025, Dec 16, 2004

Oct 15, 2003

10/686120

Andreas Hadjicostis - Carmel IN, US
Jared Brosch - Cicero IN, US
Patrick Gwin - Indianapolis IN, US

A61B008/14

600/459000

One embodiment of the present application includes providing an array ultrasound imaging phase assembly that includes a substrate and several piezoelectric elements each mounted on the substrate. The elements are spaced apart from each other and arranged in a noncylindrical pattern. An acoustic backing block is mounted to the substrate on a side opposite its matching layers. The array can be positioned along a desired region within a subject's body by movement through the circulatory system or other cavities. While the array assembly is positioned along this region, ultrasonic interrogation of an internal portion of the subject's body can be performed to generate one or more images.

2015032, Nov 12, 2015

Jul 8, 2015

14/794006

- Indianapolis IN, US
Mahesh Matam - Zionsville IN, US
Patrick Gwin - Indianapolis IN, US

Piezotech LLC - Indianapolis IN

E21B 47/00
H04B 11/00
G01B 17/02

A single critically damped acoustic stack yields a wide frequency range as an acoustic transmitter or as an acoustic transducer having particular use in well integrity determination. The critically damped present acoustic stack utilizes a plurality of stacked acoustic elements such as piezoelectric ceramics that are energized in two manners, providing different center frequencies, each producing a respective center frequency of 100% bandwidth to yield an acoustic stack having a total bandwidth exceeding the bandwidth of an acoustic element or the bandwidth of the plurality of acoustic elements. One manner of energizing is to pulse only one of the acoustic elements. The other manner is to pulse a first acoustic element then pulse a second acoustic element after a delay equal to the amount of time it takes for the first pulse to reach the face of the second acoustic element. The acoustic stack is primarily used in pulse-echo analysis of metal casing wall thickness and cement bond quality detection of wells.