A.A. Waterman (Arthur A. Waterman & Company)
The official name of the pen company established by Arthur A. Waterman was "Modern Pen Company," but although Modern produced very nice pens, A.A. Waterman's place in history lies in the fact that he was sued by the "other" Waterman, being the L.E. Waterman Fountain Pen Company, for allegedly using his last name to capitalize on the latter's good name. L.E. Waterman Company's lawsuit against A.A. Waterman resulted in later A.A. Waterman pieces being stamped with the unwieldy disclaimer, "Not Connected with the L.E. Waterman Co."
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