Top of Site > Introduction > Research Resources > Codes: Marks

Top of Site > Clamps as Things > Field Guide > Codes: Marks

The code for a mark is based on shape of elements, location of each element from top to bottom, and content of distinctive elements.

A = an arc

L = a line, preceded by a 2 or 3 as appropriate

O = an oval or circle

S = a shield or scroll

plus additional letters to distinguish variants

Thus the usual Aldrich mark is A2L, and the common Bliss Mfg Co marks are 2LRI and 2LUS.

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