1
Harvey G Weller: Illuminated scenic glass. Donald A Jacobson, December 3, 1991: US05070435 (50 worldwide citation)

A drinking glass with an upper cup and supporting stem uses light emitting diodes mounted in recesses the face of the cup in parallel with a light bulb mounted in the stem adjacent to the cup to provide illumination. A battery, switch and flasher mounted in the stem permits selection of on, off, or ...


2
Robert D Schroeder: Multiple connector trailer hitch. Donald A Jacobson, June 21, 1994: US05322313 (31 worldwide citation)

This trailer hitch uses a disk with ball connectors of varying sizes and an attachment hole on a circle near the circumference of the disk. Opposed horizontal upper and lower bars pivotally support a vertical shaft through the disk center. A number of locking holes on a circle near the center of the ...


3
Roger D DuBois: Light bulb extractor. Donald A Jacobson, January 19, 1988: US04719826 (28 worldwide citation)

A steel U-shaped pair of gripping arms are formed from steel having the proper size and shape to fit over the end of a lamp bulb. The tips of the gripper arms are formed to fit the end of the bulb and the steel is then annealed to obtain the required spring characteristics. The tips of the gripping ...


4
Dwayne A Rollag, James N Dornbush, Robert C Renner: Method and apparatus for the enhanced treatment of food processing waste waters using aerobic microorganisms. Donald A Jacobson, May 6, 1980: US04201663 (25 worldwide citation)

A method and apparatus for treating waste water, containing large quantities of organic material, by means of an aerobic bacteriological process which uses a plastic film to support an air transport system and a blanket of inexpensive biodegradable material which provides the functions of heat insul ...


5
Marshall Bulle, Dale A Johnson: Trailer hitch lock. Donald A Jacobson, September 29, 1981: US04291557 (24 worldwide citation)

An anti-theft device secured by sliding the device over a ball-connector type trailer hitch which automatically engages the hitch by means of a spring loaded bolt, to obstruct access by the ball and prevent unauthorized use of the trailer. The device is removed by retracting the bolt using only a co ...


6
Richard H Johnson: Modular electrified cover plate. Donald A Jacobson, June 11, 1985: US04522455 (21 worldwide citation)

A cover plate for an electrical receptacle outlet contains electrical circuits with flexible fingers which extend adjacent to the receptacle contacts such that the cover plate circuits are connected to the receptacle circuits by the prongs of a plug whenever a plug is inserted into the receptacle. T ...


7
Gary R Sorenson: Entry alarm. Donald A Jacobson, December 10, 1991: US05072212 (18 worldwide citation)

A self contained alarm is arranged to be attached to a door or near a building opening. One version uses a spring loaded switch held open by a door frame, which closes and sounds an audible alarm when the door is opened. A relay with normally open contacts is energized with the alarm to maintain the ...


8
Marshall R Bulle, Dale A Johnson: Trailer hitch lock. Donald A Jacobson, April 15, 1986: US04581908 (18 worldwide citation)

A lock has a base with lip extensions which fit about the flange extensions of a ball hitch receptacle to cover the ball receptacle opening. The base is secured by a spring loaded latch having a ramp-shaped upper surface which is forced downward by a flange of the ball receptacle bearing against the ...


9
Bart R Solomon: Tethered golf ball. Donald A Jacobson, October 8, 1991: US05054786 (15 worldwide citation)

A golf sling, using a tether made up of a joined resilient and a non-resilient line, uses a conventional golf ball attached to one end and an anchor attached to the opposite end to permit practicing golf in a limited area. A connector from the tether to an anchor permits using either a pin forced in ...


10
Michael B Schomaker: Temporary sign. Donald A Jacobson, July 27, 1993: US05230176 (15 worldwide citation)

Temporary real estate signs are attached to a post and extending arm rather than suspended beneath the arm. The signs are attached to a supporting body having a U-shaped cross-section. The bodies are sized to fit around the arm and post respectively. Flexible members attached in one end to the body ...



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