Boston, Massachusetts, 1932-1972.
Saint-Hyacinthe, Quebec 1879-1994; after 1994 as "Casavant Frères."
Orrville, Ohio from 1873
Buffalo, New York, from 1932.
Established Chicago, Illinois 1857; ended organ production 1942.
Pekin, Illinois 1902-1936; Succeeded Hinners & Albertsen
Brattleboro, Vermont, 1901-1959.
St. Louis, Missouri, 1873; "& Son" added in 1886; firm dissolved in 1939.
Boston, Massachusetts 1872–1881.
Highland, Illinois, from 1906.
Operated by E. M. Skinner, 1919-1932
Lawrence, Kansas, from 1920.
Los Angeles, California, 1961-1994.
New York City, c. 1887; Detroit, Michigan, 1899; Garwood, New Jersey, 1900.
North Pomfret, Vermont from 1973.
Erie, Pennsylvania, c. 1945-c.2006.
Hartford, Connecticut, 1898-1937; Firm name from inception until 1937.
New York City, New York, 1827-c.1875; branch in Baltimore, Maryland, 1847-1864.
Karl Wilhelm, Inc. Saint-Hyacinthe and Mont Saint-Hilaire, Canada from 1966.
Alliance, Ohio 1898-1973.
Houston, Texas, 1973-1999; (became Visser & Associates, Tomball Texas, 1999.)
Methuen, Massachusetts ca. 1950-1970; Lawrence, Massachusetts from 1970.
Detroit, Michigan, 1887-1897.
Newburgh, New York c.1970-1990s.
Cleveland, Ohio from 1951. Succeeded Votteler-Holtkamp-Sparling Organ Co.
Westfield, Massachusetts 1874-1898
Columbus, Ohio, 1932-1981.
Firm name after reorganization in 1937.
Charlotte, North Carolina, 1964-1996; Fort Mill, South Carolina, 1996 to at least 2015.
Denver, Colorado, from 1972
Reading, MA, 1886-c.1890; MA, c.1890-1902; Boston, MA, 1902-1932; Methuen, MA 1936; Reading, 1943; Orrville, OH, 1947-1948; Methuen, 1949-1960
Lawrence, Massachusetts, 1960–1965; Andover, Massachusetts, 1965–1970; Georgetown, Massachusetts, from 1970.
Valley Springs, South Dakota from 1972.
Louisville, Kentucky, from 1968
Merrick, New York from 1924.
Texas, from 1972.
Gloucester, Massachusetts, 1961-1979, Newburyport, Massachusetts, from 1989.
Warrensburg, Missouri, since 1979.
Seattle, Washington, 1925-mid 1970s.
Gloucester, Massachusetts, from 1961.
Lithonia, Georgia since 1973.
New York, New York ca. 1832-1900. "& Son" added ca. 1855.
San Francisco, California, 1877-1970.
Royal Oak, Michigan; Successor to A. James Aebel & Sons.
Melrose Park, Illinois, 1967; Bellwood, Illinois, from 1973,
