Simcha Blass Simcha Blass Simcha Blass (November 27, 1897 – July 18, 1982; ) was a Polish-Israeli engineer and inventor who developed the drip irrigation system with his son Yeshayahu. Simcha Blass was born in Warsaw, Poland, which was then part of the Russian Empire, to an Orthodox Jewish family. He was active in the Jewish self-defense units organized in Warsaw to defend Jews during the end of World War I. His engineering studies in Warsaw were interrupted by the Polish-Soviet War and completed after that war. During the war, he was recruited to the Polish Army, there he invented for the
Simcha Holtzberg 1976, Holtzberg was awarded the Israel Prize, for his special contribution to society and the State of Israel. Holtzberg died during a ceremony held in honor of the wounded on February 13, 1994. He is buried in the Sanhedria Cemetery in Jerusalem. The Israel Philatelic Federation issued a stamp in his honor on April 19, 1999, the 75th anniversary of his birth, showing his portrait and a legend stating "Father of the Wounded Soldiers". Dozens of streets in Israel are named in his honor, including one in Pisgat Ze'ev, Jerusalem. Simcha Holtzberg Simcha Holtzberg (sometimes spelled Holzberg) (Hebrew: שמחה הולצברג,