He actually has 2 separate patents on the electric wave filter. He invented the principle and the first practical application of the following:
1. The low‑pass filter
2. The high‑pass filter
3. The band‑pass filter
These were rudimentary, they consisted of simple inductors and capacitors. That first one is now called a "ladder filter." His 2nd patent was more about it's application to the filtration in telephone amplifiers. He'd actually ben using them for years by the time he bothered to patent them. It was his employers at the American Telephone and Telegraph Company that realized this might be important. He'd go on to have a 40 year career in radio engineering.
George graduated from MIT in 1891, and went on in 1893 to get a master’s degree from
He has been multiply awarded for thsi and other accomplishments in radio engineering. In 1936, the Institute of Radio Engineers awarded him its Medal of Honor. The American Institute of Electrical Engineers awarded him the Edison Medal. He retired from AT&T in 1935 and died in November 1954.