Patents

“Hybrid Surface Wave Transducer,” U.S. Patent No. 3,665,225 (A.P. van den Heuvel and D.B. Owen, Co‑inventors).

“Composite Surface Wave Transducer,” U.S. Patent No. 3,676,721 (A.P.van den Heuvel and R.W. Richter, Co‑Inventors).

“Electronically Variable Time Delay in Piezoelectric Media,” U.S. Patent No. 4,401,956.

“Acoustic Wave Microsensors for Measuring Fluid Flow,” U.S. Patent No. 5,003,822.

“Sensing and Signal Processing Devices Using Quasi-SH (Shear Horizontal) Acoustic Waves,” U.S. Patent No. 5,532,538 (Y. Jin, Co-Inventor).

“Method and Apparatus for Measuring the Thickness of Sludge Deposited on the Sidewall of a Centrifuge” US Patent No. 6, 213, 928 B1 (B. D. Zaitsev, Co-Inventor).

“Low Profile Transducer for Flow Meters ,” U.S. Patent No. 6,609,430 B1 (B.D. Zaitsev, Co‑Inventor).