Date of Birth: 
About John Nathan Crouse
- John Nathan Crouse was a dentist in Chicago in the 19th and early 20th centuries, best known for his work organizing dentists to litigate against the use of patents on dental procedures.
- He was a charter member of the Illinois State Dental Society, and founded the Dental Protective Association, an organization that litigated against process patents in dentistry, serving as its president until 1913.
- He also served a term as president of the American Dental Association, then known as the National Dental Association.
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