Lamb, Anthony (1703-1784), New York; also made mathematical and nautical instruments.

Lamb, John (1735-1800), New York; also made mathematical and nautical instruments.

Miller, Aaron (fl. 1748-1771), Elizabeth, N.J.; also made clocks and directional compasses.

Newell, Andrew (1749-1798), Boston; also made mathematical instruments and directional compasses.

Platt, Augustus (1809-1886), Columbus, Ohio; also made mathematical and surveying instruments.

Platt, Benjamin (1757-1833), Danbury, Litchfield, and New Milford, Conn.; Lanesboro, Mass.; and Columbus, Ohio; also made directional compasses and clocks.

Potter, John (fl. 1785), Brookfield, Mass.

Rittenhouse, Benjamin (1740-c. 1820), Philadelphia; also made astronomical instruments.

Rittenhouse, David (1732-1796), Philadelphia; also made astronomical instruments.

Rittenhouse & Evans (fl. 1770's), Philadelphia.