PS

Philip D. Sprung

📍 Calgary, CA: #1 of 87 inventorsTop 2%
Overall (1989): #7,882 of 140,708Top 6%
3
Patents 1989

Issued Patents 1989

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
4833825 System for supporting growing plants 1989-05-30
4830276 Heater system for greenhouses 1989-05-16
4800674 Greenhouse structure 1989-01-31