RB

Ralph D. Birtchet

CO Comcast: 3 patents #1,192 of 4,447Top 30%
📍 Centralia, WA: #6 of 34 inventorsTop 20%
🗺 Washington: #27,877 of 76,902 inventorsTop 40%
Overall (All Time): #1,621,396 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6203243 Two-stage paving screed extension — 2001-03-20
RE36981 Electrically heated paving screed — 2000-12-05
5417516 Electrically heated paving screed — 1995-05-23