SI

Samuel N. Irwin

IS Irwin Magnetic Systems: 2 patents #4 of 18Top 25%
📍 Ann Arbor, MI: #1,436 of 6,071 inventorsTop 25%
🗺 Michigan: #15,670 of 86,293 inventorsTop 20%
Overall (All Time): #895,354 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
4647994 Miniaturized cartridge-type tape drive for data processors Francis Lum, Michael L. Bolt, Steven E. Henke, Edmund L. Sokolik, John M. Chambors 1987-03-03
4472750 Data record with pre-recorded transducer positioning signals, and system for utilizing same Marlin K. Klumpp, Joseph H. Mueller, Francis Lum 1984-09-18
4468712 Positioner apparatus for tape recorder heads Joseph H. Mueller, Ronald G. Dawson 1984-08-28
4462053 Method for controlling a disc head Francis Lum, Bruce D. Graham, Juan F. Velazquez 1984-07-24
D270348 Integrated disc and tape recorder drive unit Otto R. Butsch, Francis Lum, Juan F. Velazquez 1983-08-30
D270055 Combined disc and tape drive Otto R. Butsch, Francis Lum, Juan F. Velazquez 1983-08-09