Donald MacDougal Campbell

AA Assa Abloy Ab: 1 patents #163 of 311Top 55%

📍 Holden Beach, NC: #1 of 3 inventorsTop 35%

🗺 North Carolina: #18,756 of 45,564 inventorsTop 45%

Overall (All Time): #1,846,412 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
11348395	Physical zone pace authentication	—	2022-05-31
5626440	Retractable beach stairway	G. Greene	1997-05-06