John Derk Mack

US Patent:

43360734, Jun 22, 1982

Filed:

Aug 18, 1981

Appl. No.:

6/293979

Inventors:

John H. Mack - Hyattsville MD

International Classification:

B08B 100
B43K 500

US Classification:

134 6

Abstract:

Apparatus for cleaning glass or other nonporous surfaces having an applicator pad of open pored spongy material for juxtaposition with the surface to be cleaned. A disposable cloth or tissue is interposed between the pad and the surface to be cleaned. A flexible conduit directs moisture laden gas, usually human breath, from the user's mouth, to the applicator pad and thence to the surface to be cleaned where moisture condenses for easy removal of soil therefrom. The escape of gas in undesired directions is avoided by a hood element which confines the gas to the spongy material except where it contacts the surface to be cleaned.

US Patent:

45960410, Jun 17, 1986

Filed:

Jun 17, 1983

Appl. No.:

6/505442

Inventors:

John L. Mack - Arlington VA

International Classification:

H04B 100
H04B 700

US Classification:

455 53

Abstract:

A participant-identification, recording and playback system includes a plurality of radio transmitters, preferably FM transmitters, which are tuned to respectively different center frequencies, and serve as respective wireless microphones assigned to respective participants. A radio receiver which is operatively associated with a recording and playback system is provided to receive signals from all of the wireless microphones, reduce these to a plurality of IF signal and record the same. The playback portion of the system includes a plurality of demodulators which allows one to recover all the audio signals on a selective basis for transcription. Circuitry is provided to identify the speakers and to indicate start and stop times.

US Patent:

20210045583, Feb 18, 2021

Filed:

Aug 15, 2019

Appl. No.:

16/541629

Inventors:

John Mack - Laurel MD, US

International Classification:

A47J 43/27
A47G 19/22

Abstract:

An ice cream float assembly includes a first dish that is removably coupled to a beverage bottle thereby facilitating a beverage to be passed therethrough. Ice cream is selectively positioned in the first dish thereby facilitating the beverage to form a mixture with the ice cream. A first coupler is coupled to and extends away from the first dish and the first coupler removably engages the beverage bottle. A second dish is removably coupled to the first dish such that each of the first dish and the second dish form a globe to contain the ice cream. The second dish has a spout extending into an interior of the second dish to pass the mixture of beverage and ice cream therethrough for drinking.