William D. Armstrong

SC Scientific Design Company: 2 patents #1 of 7Top 15%

YS Yamashina Seiko-Sho: 1 patents #1 of 1Top 100%

📍 Memphis, TN: #4 of 80 inventorsTop 5%

🗺 Tennessee: #26 of 740 inventorsTop 4%

Overall (1989): #6,263 of 140,708Top 5%

Patents 1989

Issued Patents 1989

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4864042	Process for preparing silver catalysts	—	1989-09-05
4842467	Concrete screw	—	1989-06-27
4841080	Process for the oxidation of ethylene to ethylene oxide	—	1989-06-20