The Works Progress Administration (or WPA), created on May 6, 1935 with the signing of Executive Order 7034[?], was the largest and most comprehensive New Deal agency. It was a make work program that channeled jobs and income to the unemployed.
... friction.
The device is covered by US patents 3,726,146 (1973) and 5,353,655 (1994) by L.A. Mishler and US patent 5,800,311 (1998) by P.S.Chuang.
Externa ...