David L Purcell

US Patent:

6347857, Feb 19, 2002

Filed:

Sep 23, 1999

Appl. No.:

09/404558

Inventors:

David A. Purcell - San Diego CA
David A. Neese - Escondido CA
Warren Free - Anaheim CA

Assignee:

Encad, Inc. - San Diego CA

International Classification:

B41J 29393

US Classification:

347 19

Abstract:

A droplet deposition analysis system for an ink jet printer including a flexible transparent substrate. The printer may include a light source on one side of the substrate, and an optical detector on the other side of the substrate.

US Patent:

6375298, Apr 23, 2002

Filed:

Feb 23, 2001

Appl. No.:

09/792229

Inventors:

David A. Purcell - San Diego CA
Richard A. Murray - San Diego CA
Dan J. Dull - San Diego CA

Assignee:

Encad, Inc. - San Diego CA

International Classification:

B41J 2938

US Classification:

347 14, 347 50, 347 19

Abstract:

An ink jet printer with intelligent components includes an ink jet cartridge and a roll of print media, each of which incorporate memory elements. Environmental sensors such as temperature and humidity sensors may also be provided. Data from the memory elements and environmental sensors is used to optimize printer operations, and to provide additional information to printer operators.

US Patent:

6565197, May 20, 2003

Filed:

Nov 10, 1997

Appl. No.:

08/966894

Inventors:

Richard A. Murray - San Diego CA
William M. Fries - San Diego CA
David A. Purcell - San Diego CA

Assignee:

Encad, Inc. - San Diego CA

International Classification:

B41J 2175

US Classification:

347 85

Abstract:

An ink jet printer having an inking system that includes an ink jet cartridge, a large ink reservoir mounted inside the housing of the ink jet printer at a location which is remote from the ink jet cartridge and tubing connecting the ink reservoir to the ink jet cartridge. The large ink reservoirs may be pancake shaped, and may be stacked in side by side horizontal manner within the housing. A portion of the reservoir is transparent, and is visible to the operator for operator monitoring of ink level through openings in the printer housing placed in juxtaposition with the transparent portion of the large ink reservoirs.

US Patent:

62276433, May 8, 2001

Filed:

Feb 25, 1998

Appl. No.:

9/030631

Inventors:

David A. Purcell - San Diego CA
Richard A. Murray - San Diego CA
Dan J. Dull - San Diego CA

Assignee:

ENCAD, Inc. - San Diego CA

International Classification:

B41J 2938
B41J 29393

US Classification:

347 19

Abstract:

An ink jet printer with intelligent components includes an ink jet cartridge and a roll of print media, each of which incorporate memory elements. Environmental sensors such as temperature and humidity sensors may also be provided. Data from the memory elements and environmental sensors is used to optimize printer operations, and to provide additional information to printer operators.

US Patent:

56869479, Nov 11, 1997

Filed:

May 3, 1995

Appl. No.:

8/433792

Inventors:

Richard A. Murray - San Diego CA
William M. Fries - San Diego CA
David A. Purcell - San Diego CA

Assignee:

ENCAD, Inc. - San Diego CA

International Classification:

B41J 2175

US Classification:

347 85

Abstract:

An ink jet printer having an inking system that includes an ink jet cartridge, a large ink reservoir mounted inside the housing of the ink jet printer at a location which is remote from the ink jet cartridge and tubing connecting the ink reservoir to the ink jet cartridge. The large ink reservoirs may be pancake shaped, and may be stacked in side by side horizontal manner within the housing. A portion of the reservoir is transparent, and is visible to the operator for operator monitoring of ink level through openings in the printer housing placed in juxtaposition with the transparent portion of the large ink reservoirs.

US Patent:

20200206068, Jul 2, 2020

Filed:

Mar 10, 2020

Appl. No.:

16/814168

Inventors:

- San Diego CA, US
Yichuan Pan - San Diego CA, US
David A. Purcell - San Diego CA, US
Nebojsa Sataric - Krusevac, RS

Assignee:

Protostar, Inc., a Delaware Corporation - San Diego CA

International Classification:

A61H 3/04

Abstract:

A collapsible upright wheeled walker with adjustable armrests that support sufficient user upper-body weight to facilitate a natural upright gait and provide unassisted mobility for a wide range of mobility-impaired individuals. The apparatus may be easily and quickly folded (and unfolded) and may include bilateral stabilizing wheel suspensions to facilitate navigation over uneven terrain. The apparatus includes a frame-stiffening folder assembly and may also include mechanical brakes, an adjustable upper armrest assembly with removable padded forearm supports and two pairs of handles, at least one of which is disposed sufficiently forward to place the user within the polygonal footprint defined by the front and rear wheels to provide support without leaning, stooping, or risking falls.

US Patent:

20190254918, Aug 22, 2019

Filed:

Apr 29, 2019

Appl. No.:

16/397897

Inventors:

- San Diego CA, US
Yichuan Pan - San Diego CA, US
David A. Purcell - San Diego CA, US
Nebojsa Sataric - Krusevac, RS

Assignee:

Protostar, Inc., a Delaware Corporation - San Diego CA

International Classification:

A61H 3/04

Abstract:

A collapsible upright wheeled walker with adjustable armrests that support sufficient user upper-body weight to facilitate a natural upright gait and provide unassisted mobility for a wide range of mobility-impaired individuals. The apparatus may be easily and quickly folded (and unfolded) and may include bilateral stabilizing wheel suspensions to facilitate navigation over uneven terrain. The apparatus includes a frame-stiffening folder assembly and may also include mechanical brakes, an adjustable upper armrest assembly with removable padded forearm supports and two pairs of handles, at least one of which is disposed sufficiently forward to place the user within the polygonal footprint defined by the front and rear wheels to provide support without leaning, stooping, or risking falls.

US Patent:

20180360686, Dec 20, 2018

Filed:

Aug 28, 2018

Appl. No.:

16/114821

Inventors:

- San Diego CA, US
Yichuan Pan - San Diego CA, US
David A Purcell - San Diego CA, US
Nebojsa Sataric - Krusevac, RS

Assignee:

Protostar, Inc., a Delaware Corporation - San Diego CA

International Classification:

A61H 3/04
A61H 3/00

Abstract:

A collapsible upright wheeled walker with adjustable armrests that support sufficient user upper-body weight to facilitate a natural upright gait and provide unassisted mobility for a wide range of mobility-impaired individuals. The apparatus may be easily and quickly folded (and unfolded) and may include bilateral stabilizing wheel suspensions to facilitate navigation over uneven terrain. The apparatus includes a frame-stiffening folder assembly and may also include mechanical brakes, an adjustable upper armrest assembly with removable padded forearm supports and two pairs of handles, at least one of which is disposed sufficiently forward to place the user within the polygonal footprint defined by the front and rear wheels to provide support without leaning, stooping, or risking falls.