History of writing instruments: Which insurance salesman patented and popularized the modern fountain pen in 1884? Context: The inventor improved ink flow with a capillary feed and founded a company that bore his name. Choose the correct name.

Given data

• Year: 1884.
• Profession: insurance salesman who turned inventor/entrepreneur.

Concept / Approach
The modern fountain pen became practical when a reliable capillary feed prevented ink blots. This is associated with Lewis E. Waterman, who patented an improved feed in 1884 and founded the Waterman Pen Company.

Step-by-step reasoning
Match clues: (insurance salesman) + (1884 patent) + (fountain pen) → Lewis Edson Waterman.

Common pitfalls

• Confusing ballpoint inventors like László Bíró or early stylographic pens with fountain pens.

Final Answer
Lewis Edson Waterman.