DP

Donald F. Pfeuffer

Ricoh Company: 3 patents #4,826 of 9,818Top 50%
RS Ricoh Systems: 1 patents #7 of 16Top 45%
📍 San Jose, CA: #12,320 of 32,062 inventorsTop 40%
🗺 California: #124,610 of 386,348 inventorsTop 35%
Overall (All Time): #1,306,501 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
4577955 Electrophotographic copying apparatus including a guillotine cleaner blade arrangement and method of operation Edward F. Mayer 1986-03-25
4572655 Electrophotographic copying apparatus and method of use including electrostatic toner recycling procedure Elden R. Morrison, Edward F. Mayer, Victor B. van Blerk 1986-02-25
4427756 Developer crossmixing method Edward F. Mayer 1984-01-24
4361109 Developer crossmixing apparatus Edward F. Mayer 1982-11-30