Samuel English Ritchie

📍 Alexandria, VA: #635 of 1,823 inventorsTop 35%

🗺 Virginia: #12,642 of 34,511 inventorsTop 40%

Overall (All Time): #2,195,839 of 4,157,543Top 55%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
6811402	Method of playing a mathematical game	—	2004-11-02
5975909	Utensil manipulation training tools and method	—	1999-11-02