William C. Kalkwarf

MC Master Lock Company: 3 patents #69 of 208Top 35%

📍 Cedar Falls, IA: #156 of 441 inventorsTop 40%

🗺 Iowa: #4,661 of 15,303 inventorsTop 35%

Overall (All Time): #1,574,339 of 4,157,543Top 40%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
D588849	Cabinet	—	2009-03-24
D587047	Chest and cabinet	—	2009-02-24
D574629	Chest	—	2008-08-12