Johnston; Robert G.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Johnston; Robert G..The latest application filed is for "vertically and horizontally balanced subwoofer".
- Johnston; Robert G. - Amprior Ontario N/A CA
- Johnston; Robert G. - Arnprior CA
- Johnston; Robert G. - Amprior CA
- Johnston, Robert G. - Parkland FL
- Johnston; Robert G. - Almonte CA
- Johnston; Robert G. - Medford Lakes NJ
- Johnston; Robert G. - Rochester NY
| Patent | Date |
|---|---|
| Vertically and horizontally balanced subwoofer Grant 9,462,391 - Johnston , et al. October 4, 2 | 2016-10-04 |
| Vertically and Horizontally Balanced Subwoofer App 20160094909 - Johnston; Robert G. ; et al. | 2016-03-31 |
| Magnetic coupling for stereo loudspeaker systems Grant 9,071,897 - Johnston June 30, 2 | 2015-06-30 |
| Enclosure System With Acoustic Element App 20130156218 - Annacone; William R. ; et al. | 2013-06-20 |
| Swivel tweeter mechanism for a constant phase coaxial acoustic transducer Grant 8,243,963 - Gladwin , et al. August 14, 2 | 2012-08-14 |
| Ceiling or wall-mounted loudspeaker system with anti-diffraction wave launch device Grant 8,014,545 - Grant , et al. September 6, 2 | 2011-09-06 |
| Swivel tweeter mechanism for a constant phase coaxial acoustic transducer App 20100322457 - Gladwin; Timothy A. ; et al. | 2010-12-23 |
| Electrodynamic acoustic transducer Grant 7,684,582 - Gladwin , et al. March 23, 2 | 2010-03-23 |
| Ceiling or wall-mounted loudspeaker system with anti-diffraction wave launch device App 20080144873 - Grant; Matthew ; et al. | 2008-06-19 |
| Electrodynamic acoustic transducer App 20070036382 - Gladwin; Timothy A. ; et al. | 2007-02-15 |
| Internet based program for generating roof contract specifications App 20020046044 - Johnston, Robert G. ; et al. | 2002-04-18 |
| Multi-driver in-phase bipolar array loudspeaker Grant 5,887,068 - Givogue , et al. March 23, 1 | 1999-03-23 |
| Positioning unit Grant 5,779,209 - Rello July 14, 1 | 1998-07-14 |
| Coating carrier materials by electrostatic process Grant 4,209,550 - Hagenbach , et al. June 24, 1 | 1980-06-24 |
| P-xylene vapor phase polymerization coating of electrostatographic particles Grant 3,908,046 - Fitzpatrick , et al. September 23, 1 | 1975-09-23 |
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