US patent 2232613. Klipsch, P.W., 2/18/1941. Equalizer. US patent 2238023. Klipsch, P.W., 4/8/1941. Electrical prospecting. US patent 2243428. Klipsch, P.W., 4/27/1941. Mixing circuit for electrical prospecting. US patent 2251549. Klipsch, P.W., 8/5/1941. Method of electrical prospecting. US patent 2293024. Klipsch, P.W., 8/11/1942. Firearm vibration control. US patent 2302699. Klipsch, P.W., 11/14/1942. Horn for loud-speaker. US patent 2310243. Klipsch, P.W., 2/9/1943. Loudspeaker. US patent 2373692. Klipsch, P.W., 4/17/1945. Rotating band tester. US patent 2450003. Klipsch, P.W., 9/28/1948. Loud-speaker horn. US patent 2537141. Klipsch, P.W., 1/9/1951. Crossover filter network. US patent 2612558. Klipsch, P.W., 9/30/1952. Loudspeaker (Rebel). US patent 2731101. Klipsch, P.W., 9/30/1952. Logarithmic converter circuit. US patent 3330966. Klipsch, P.W., 7/11/1967. Small dimension low frequency folded exponential horn loudspeaker with unitary sound path and loudspeaker system including same. US patent 4138594. Klipsch, P.W., 2/6/1979. Low frequency folded exponential horn loudspeaker apparatus with bifurcated sound path. US patent 4210223. Gillum, G. C./ Klipsch, P.W., 7/1/1980. Crossover network for optimizing efficiency and improving response of loudspeaker system. US patent 4237340. Klipsch, P.W., 12/2/1980. Anechoic chamber arrangement. US patent 4387786. Klipsch, P.W/Hunter, J. R., 6/14/1983. References External links Official Klipsch Audio Technologies website 1980 Interview transcript of Klipsch by Audio Engineering Society, retrieved August 8, 2008 "Horn for Loudspeaker", filed February 1940, issued February 1943 1904 births 2002 deaths American acoustical engineers American electrical engineers People from Hope, Arkansas United States Army officers United States Army personnel of World War II People from Elkhart, Indiana 20th-century American engineers 20th-century American inventors