Ivan B. Chapman, Jr.

WC Western Electric Company: 2 patents #78 of 531Top 15%

AT AT&T: 1 patents #10,626 of 18,772Top 60%

📍 Baltimore, MD: #1,274 of 4,923 inventorsTop 30%

🗺 Maryland: #10,129 of 35,612 inventorsTop 30%

Overall (All Time): #1,679,993 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4523498	Ergonomical in-line tool	—	1985-06-18
4352479	Adjustable support	—	1982-10-05
4330093	Thumb-controlled hand-held tool	—	1982-05-18