Keith A. Chen

📍 Milwaukee, WI: #1,543 of 2,770 inventorsTop 60%

🗺 Wisconsin: #23,834 of 40,088 inventorsTop 60%

Overall (All Time): #4,014,094 of 4,157,543Top 100%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4513776	Automatic gas shutoff valve	—	1985-04-30