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- Mayer, Alfred
Country Era 1867-1922
Symbol cartouche, circle, frame, x
Shape cartouche, circle, frame
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- Mayer, Martin
Country City Mayence
Symbol circle, star, wheel
Shape circle, star
Era e.1888
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- Mayrhofer, Adolf von
Country City Munich
Symbol cartouche, circle, frame, grapes, tree
Shape cartouche, circle
Era e.(1864-1929)
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- McTeigue & Co.
Country City New York NY
Symbol cartouche, circle, frame
Shape cartouche, circle, frame
Era e.1895
-
- Melendez, Miguel
Country City Taxco
Symbol circle
Shape circle
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- Melendez, Rafael
Country City Taxco
Symbol cartouche, circle, frame
Shape cartouche, circle, frame
Era (1911-1980)
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- Mercury Ring Corporation
Country City New York NY
Symbol cartouche, circle, frame, helmet, mercury, people, profile, wings
Shape cartouche, circle, frame
Era c.1950
-
- Metcalf & Rover
Country City New York NY
Symbol cartouche, circle, frame
Shape cartouche, circle, frame
Era c.1922
-
- Meyer Inc., Louis J.
Country City Philadelphia PA
Symbol cartouche, circle, frame
Shape cartouche, circle, frame
Era c.1934
-
- Miller Co., J.M.
Country City New York NY
Symbol belt, cartouche, circle, frame, windmill, x
Shape cartouche, circle, frame
Era c.1934
-
- Miller Fuller & Whiting
Country City North Attleboro MA
Symbol cartouche, circle, frame, legs, people
Shape cartouche, circle, frame
Era c.1915
-
- Milroy, S. K.
Country City Toronto ONT
Symbol circle, cross
Shape circle, cross
Era c.1922
-
- Moore & Evans
Country City Chicago IL
Symbol arrow, cartouche, circle, frame
Shape cartouche, circle, frame
Era c.1934
-
- Moore-DeGrazier Co.
Country City Dallas TX
Symbol banner, cartouche, circle, frame
Shape cartouche, circle, frame
Era c.1934
-
- Mosbacher & Co.
Country City New York NY
Symbol cartouche, circle, flower, frame, leaf, plant
Shape cartouche, circle, frame
Era c.1896, c.1915
-
- Muroff Brothers
Country City New York NY
Symbol cartouche, circle, frame
Shape cartouche, circle, frame
Era c.1950