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
4688161	Regulated Power Supply Apparatus and Method Using Reverse Phase Angle Control	US	Covington	Vari-Lite	08-18-1987
4663698	Apparatus for Directing a Beam of Light	US	Tomlinson		05-05-1987
4633161	Improved Inductorless Phase Control Dimmer Power Stage with Semiconductor Controlled Voltage Rise Time	US	Callahan, Chester, Goddard		12-30-1986
4602321	Light Source Having Automatically Variable Hue, Saturation and Beam Divergence	US	Bornhorst	Vari-Lite	07-22-1986
4600976	Color Changer Mechanism	US	Callahan		07-15-1986
4598345	Remote Controlled Illumination Equipment	US	Kleeman		07-01-1986
4591955	Illuminating Device Producing a Ripple Effect	US	Kallay		05-27-1986
4550276	Bus Structure for Multiscene Manual Lighting Consoles	US	Callahan, Goddard		10-29-1985
4536832	Replaceable Light Source Assembly	US	Lemons	Altman Stage Lighting	08-20-1985
4535394	Variable Color Floodlight	US	Dugre		08-13-1985
4527198	Followspot Parameter Feedback	US	Callahan		07-02-1985
4512117	Modular Proscenium Theatre	US	Lange	Interlock Structures International	04-23-1985
4511824	Parallel Access Memory Lighting System	US	Goddard		04-16-1985
4462067	Spotlight and Adjusting System	US	Altman	Altman Stage Lighting	07-24-1984
4460943	Azimuth and Elevation Control System	US	Callahan		07-17-1984
4459014	Subtractive Filter for the Printing of Color Photographic Film	US	Thebault	Kis France	07-10-1984
4437169	Stage Lighting Control System	US	Bertenshaw, Lockwood, Brown	The Rank Organisation	03-13-1984
4437169	Stage Lighting Control System	US	Bertenshaw, Lockwood, Brown	Strand Lighting	03-13-1984
D270481	Light Projector	US	Whitright		09-06-1983
4392187	Computer Controlled Lighting System Having Automatically Variable Position, Color, Intensity and Beam Divergence	US	Bornhorst	Vari-Lite	07-05-1983