| 1985 | John R. Pierce, California Beta '33 | for pioneering design of communications satellites |
| 1993 | Kary B. Mullis, Georgia Alpha '66 | for development of the polymerase chain reaction which revolutionized DNA analysis |
| 1994 | William H. Pickering, California Beta '32 | for design of radio telemetry systems and spacecraft for unmanned space and planetary explorations |
| 1995 | Nick Holonyak Jr., Illinois Alpha '50 | for pioneering work in the development of visible diode lasers and LED's |
| 1997 | Joseph F. Engelberger, New York Alpha '46 | for pioneering work in the development of industrial robots |