Hooker & Fairman (before 1810), Newburyport, Mass.
Jacks, James (fl. 1780's), Charleston, S.C.; also made surveying instruments.
Jayne, John (late 18th century), Salem, Mass.
King & Hagger (1759/60 to early 1760's), Newport, R.I.; also made nautical instruments.
King, Benjamin (1707-1786), Newport, R.I.; also made nautical instruments.
King, Daniel (1704-1790), Salem, Mass.
King, Samuel (fl. 1786), Newport, R.I.
Lamb, A. & Son (1780's), New York.
Lamb, Anthony (1703-1784), Virginia, Philadelphia, New York, and Hunter's Key, N.Y.; also made surveying and nautical instruments.
Lamb, John (1735-1800), New York; also made nautical and surveying instruments.