Ravi C Krishnan

US Patent:

6377685, Apr 23, 2002

Filed:

Apr 23, 1999

Appl. No.:

09/296809

Inventors:

Ravi C. Krishnan - Bethesda MD 20814

International Classification:

H04M 100

US Classification:

37943307, 379368

Abstract:

A cluster key arrangement may be mechanically configured or electronically configured. The cluster key arrangement may include twelve cluster keys configured in an arrangement of three columns by four rows, such as conventionally found on standard telephones. The cluster key arrangement may also be configured for use on cellular/mobile telephones, television remote controls, other handheld data entry devices, automotive controls, desktop/wall-mounted/cordless telephones, combination telephone recorders, Personal Digital Assistants, and other electronic devices. The mechanically or electronically configured cluster keys provide a user with the ability to select one of a plurality of key elements representing numbers, letters, symbols, functions, etc. , in a mutually exclusive manner.

US Patent:

20020110237, Aug 15, 2002

Filed:

Apr 22, 2002

Appl. No.:

10/126534

Inventors:

Ravi Krishnan - Bethesda MD, US

International Classification:

H04M001/00
H04M009/00

US Classification:

379/419000, 379/433070

Abstract:

A cluster key arrangement may be mechanically configured or electronically configured. The cluster key arrangement may include twelve cluster keys configured in an arrangement of three columns by four rows, such as conventionally found on standard telephones. The cluster key arrangement may also be configured for use or cellular/mobile telephones, television remote controls, other handheld data entry devices, automotive controls, desktop/wall-mounted/cordless telephones, combination telephone recorders, Personal Digital Assistants, and other electronic devices. The mechanically or electronically configured cluster, keys provide a user with the ability to select one of a plurality of key elements representing numbers, letters, symbols, functions, etc., in a mutually exclusive manner.

US Patent:

41801539, Dec 25, 1979

Filed:

Apr 27, 1978

Appl. No.:

5/900729

Inventors:

Ravi C. Krishnan - Bethesda MD
Charles M. Blackburn - District Heights MD

Assignee:

Sigma Systems, Inc. - Capitol Heights MD

International Classification:

B65G 4728

US Classification:

198425

Abstract:

A continuously moving stream of pieces taken from a storage bin is separated into precisely counted batches, for bagging, or the like. The flow speed of the pieces is optimized and substantially constant at a highest possible speed of flow higher than the batcher operating speeds will handle. Thereby this invention provides an alternative to eliminate the need for reducing flow speed because batchers require relatively long operating times and to avoid the disadvantage that reduction of the flow line speed when handling many successive batch pieces which is a slow process because of the high inherent inertia to changes of speed. In order to increase the flow speeds to higher effective batch handling rates, some of the pieces are removed from a high speed stream flow to create gaps in the flow stream between batches, thereby permitting optimized time interfacing with the necessary batching operations which thereby may proceed at a slower rate than the average piece by piece flow rate. Also, this technique assures that there is always an exact count since the batcher, which is time limited at the critical system point, has adequate time to perform its function in the gap period without losing or gaining a piece from the stream. Also, handling and storage of pieces removed from the stream is expedited by removing the pieces from the stream directly back into the storage bin feeding the stream, and simplified control systems responsive to gap detection techniques can be used.