| 1974 | John Bardeen, Wisconsin Alpha '28 | Transistor |
| 1974 | William B. Shockley, California Beta '32 | Transistor |
| 1977 | Lee de Forest, Connecticut Alpha 1896 | Audion amplifier |
| 1977 | Charles P. Steinmetz, Illinois Alpha 1902 | System of electrical distribution |
| 1977 | Vladimir K. Zworykin, Pennsylvania Delta '12 | Cathode ray tube |
| 1978 | Leo H. Baekeland, New York Alpha 1882 | Synthetic resins |
| 1979 | Jay W. Forrester, Massachussetts Beta '39 | Multicoordinated digital information storage device |
| 1980 | Edwin H. Armstrong, New York Alpha '13 | Method of receiving high frequency oscillations |
| 1980 | Charles F. Kettering, Ohio Gamma 1904 | Engine starting devices and ignition system |
| 1981 | Harold S. Black, Massachussetts Alpha '21 | Negative feedback amplifier |
| 1981 | Chester F. Carlson, California Beta '30 | Electrophotography |
| 1981 | C. Stark Draper, Massachussetts Beta '22 | Gyroscopic apparatus |
| 1982 | Jack S. Kilby, Illinois Alpha '47 | Miniaturized electronic circuits |
| 1983 | Andrew Alford, Massachussetts Epsilon '24 | Localizer antenna system |
| 1985 | Marvin Camras, Illinois Beta '40 | Magnetic recording |
| 1985 | Willis H. Carrier, New York Delta '01 | Air conditioner |
| 1986 | Harold Edgerton, Massachussetts Beta '25 | Stroboscope |
| 1986 | Wilson Greatbatch, New York Nu '50 | Medical cardiac pacemaker |
| 1989 | Irving Langmuir, New York A 1903 | High-vacuum electron tube and gas-filled incandescent lamp |
| 1990 | Herman Hollerith, New York A 1879 | Punch-card tabulation machine system |
| 1991 | Elmer A. Sperry, New Jersey Alpha '21 | Gyroscopic compass |
| 1993 | William P. Lear, Michigan Alpha '55 | Aircraft navigational radar |
| 1993 | Peter C. Schultz, New Jersey Beta '64 | Optical fiber |
| 1994 | Robert N. Hall, California Beta '42 | High-voltage, high-power semiconductor PIndiana rectifier |
| 1995 | Waldo L. Semon, Washington Alpha' 20 | Synthetic rubber (flexible PVC) |
| 1996 | Marcian E, Hoff Jr., New York Gamma '58 | Single chip CPU |
| 1997 | Seymour R. Cray, Minnesota Alpha '49 | Supercomputer |
| 1997 | Mark E. Dean, Tennessee Alpha '79 | Personal computer architecture |
| 1997 | Dennis H. Moeller, Indiana Alpha '80 | Personal computer architecture |
| 1998 | Douglas C. Engelbart, Oregon Alpha '48 | Computer mouse |
| 1998 | Kary B. Mullis, Georgia Alpha '66 | Polymerase chain reaction |
| 2002 | Rodney D. Bagley, Utah Alpha '59 | Ceramic substrate for catalytic converters |
| 2002 | Irwin M. Lachman, NJ Beta '52 | Ceramic substrate for catalytic converters |
| 2003 | Frank J. Cepollina, California Zeta '59 | Satellite servicing techniques |
| 2003 | Maxime A Faget, Louisiana Alpha '43 | Space capsule design |
| 2003 | Leroy R. Grumman, New York Delta '16 | Retractable landing gear; folding wing |
| 2003 | Thomas Midgley, Jr., New York Delta '11 | Ethyl gasoline |
| 2003 | John K. Northrop, California Delta '49 | Flying wing plane; all-metal high-wing monocoque airplane (Vega) |
| 2003 | John R. Pierce, California Beta '33 | Communications satellite |
| 2003 | Harold A. Rosen, Louisiana Beta '44 | Spin stabilized synchronous communications satellite |
| 2003 | Theodor von Karman, California Beta '02 | Turbo jet |
| 2003 | Hans J.P. von Ohain, Ohio Eta '35 | Jet engine |
| 2003 | Richard T. Whitcomb, Massachussetts Alpha '43 | Supercritical wing |
| 2003 | Sam B. Williams, Michigan Eta '42 | Small fan-jet engine |
| 2004 | Vannevar Bush, Massachussetts Beta '16 | Differential analyzer |
| 2004 | Ray M. Dolby, California Gamma '57 | Dolby noise reduction |
| 2004 | Claude E. Shannon, Michigan Gamma '36 | Pulse code modulation |
| 2005 | Jacob Rabinow, New York Eta '48 | Optical character reading |
| 2006 | Robert W. Gore, Delaware Alpha '59 | ePTFE known by the GORE-TEX® brand name |
| 2006 | Robert S. Langer, New York Delta '70 | Controlled drug delivery |
| 2006 | Elihu Thomson, Massachussetts Beta 1870 | Arc lighting |
| 2007 | Paul C. Lauterbur, Illinois Alpha '51 | Magnetic resonance imaging (MRI) |
| 2007 | Robert M. Metcalfe, Massachussetts Beta '68 | Multipoint data-communication system with collision detection |