Da Keng: Firearm adapted for use in low light, illuminating rear sight, and method for aligning sights in low light environments. J A McKinney Jr, June 29, 2010: US07743546 (38 worldwide citation)

A rugged adjustable, optical alignment system is well suited for use in low light environments or at night. A rear sight includes a U-shaped array of, preferably, first second and third substantially cylindrical, transparent, tritium vials arranged such that the elongated cylindrical side surfaces o ...

Da Keng: Removable optical sight mount adapted for use with M14, M1A and similar rifles and method for removably attaching an optical sight to a rifle. J A McKinney Jr, April 13, 2010: US07694450 (28 worldwide citation)

A removable optical sight mount adapted for use with a military-style rifle such as an M1A provides a centrally aligned support projecting well to the rear for use with sights having very limited eye relief. The removable sight advantageously uses a three point lock up or attachment to the rifle, th ...

Thomas Ertl: Adjustable rear pistol sight. Keng s Firearms Specialty, J A McKinney Jr, November 3, 2009: US07610712 (6 worldwide citation)

An adjustable rear pistol sight has a sight base and a sight block. The sight block is secured in a recess in the sight base and has both windage and elevation adjustment capabilities. The sight base has a dovetail that will be receivable in a cooperatively shaped notch in a slide of a pistol with w ...

Aland Santamarina, Alan S Romack, Shawn Martin: Spa jet yielding increased air entrainment rates. Bowles Fluidics Corporation, J A McKinney Jr, May 31, 2011: US07950077 (2 worldwide citation)

An improved spa nozzle that is capable of entraining high air flow rates from the surrounding environment, said nozzle of the type having a water input conduit of diameter D, a flow output conduit having entry and diameter of DID, a transition conduit having a diameter of ID and a length of PL, and ...

Matthew S Polk Jr, Bradley M Starobin: Compact audio reproduction system with large perceived acoustic size and image. Polk Audio, J A McKinney Jr, October 19, 2010: US07817812 (2 worldwide citation)

A compact audio reproduction system for two input signals includes at least four loudspeakers disposed at the vertices of a quadrilateral not more than two feet on any side and such that no two loudspeakers are located at a distance from one another which is less than one-fourth the greatest distanc ...