William Hardcastle

📍 Mendota Heights, MN: #128 of 202 inventorsTop 65%

🗺 Minnesota: #32,449 of 52,454 inventorsTop 65%

Overall (All Time): #2,437,865 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
12365429	Nose plug for underwater diving	—	2025-07-22