Method and apparatus for multiple-wave doppler velocity meter Grant US-9717471-B2 United States of America 01 Aug 2017
Method and apparatus for estimation and display of spectral broadening error margin for… Grant US-6176143-B1 United States of America 23 Jan 2001
Method of and apparatus for generating doppler sounds Grant US-5555514-A United States of America 10 Sep 1996