Industry Patents

Click on any of the patent numbers below to reach a page giving more detail on that specific patent.

Once at the detail page you will be able to download a pdf version of the patent or application. Search results are displayed in date order, newest issued patents first. You'll always find the most recent at the top of the list.:-

Patent #	Title		Inventor	Assignee	Granted
4977484	Dimmer Rack	US	Cunningham, Esakoff	Lee Colortran	12-11-1990
4975629	Inductorless Controlled Transition and Other Light Dimmers	US	Callahan, Chester, Goddard		12-04-1990
4972306	Compact Variable Diffuser for use in a Luminaire	US	Bornhorst	Vari-Lite	11-20-1990
4972125	Plug-In Dimmer Module for Lighting Control Systems	US	Cunningham, Esakoff	Lee Colortran	11-20-1990
4962687	Variable Color Lighting System	US	Belliveau, Floyd, Tulk	Supervision	10-16-1990
4958265	Symmetrical Color Changer System	US	Solomon	Altman Stage Lighting	09-18-1990
4947302	Improvements to Control Systems for Variable Parameter Lighting Fixtures	US	Callahan		08-07-1990
4945459	Two-Axis Beam Steering System for Use in Automated Light Fixtures	US	Ferren, Harrison, Hope, Kohut		07-31-1990
4931916	Apparatus for Mechanically Adjusting Lighting Fixture Beam Azimuth and Elevation	US	Callahan		06-05-1990
4914556	Spectral Filter Module	US	Richardson	Morpheus Lights	04-03-1990
4912751	Method and Device for Establishing and Writing a Luminous Pattern	US	Leclercq		03-27-1990
4897770	Symmetrical Color Changer System	US	Solomon	Altman Stage Lighting	01-30-1990
4894760	Additive Color-Mixing Light Fixture Employing a Single Moveable Multi-Filter Array	US	Callahan		01-16-1990
4893225	Color Changer	US	Solomon	Altman Stage Lighting	01-09-1990
4891738	Selectable Aperture Module	US	Richardson, Richardson	Morpheus Lights	01-02-1990
4890208	Stage Lighting Apparatus	US	Izenour	Lehigh University	12-26-1989
4862336	Dimorphic Truss Unit	US	Richardson, Richardson	Morpheus Lights	08-29-1989
4855884	Variable Beamwidth Stage Light	US	Richardson	Morpheus Lights	08-08-1989
4843529	Stage Lighting Apparatus	US	Izenour	Lehigh University	06-27-1989
4843528	Illumination Lamp Apparatus	US	Pearce-Harvey, Tomlinson, French	Tasco	06-27-1989