Charles A. Speas

📍 Towson, MD: #110 of 347 inventorsTop 35%

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

Overall (All Time): #1,685,627 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4264016	Plastic drums and drum assemblies with preformed inserts	—	1981-04-28
4209104	Drum assemblies with preformed inserts	—	1980-06-24
4207284	Method of making plastic drum assemblies with preformed inserts	—	1980-06-10