Inventor
Mark A. Walker
Inventor
Whitehall, PA, US
Overview
Patents· 20 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E06Bprimary
E06BFixed or movable closures for openings in buildings, vehicles, fences or like enclosures in general, e.g. doors, windows, blinds, gates23%
H03FAmplifiers10%
E04FFinishing work on buildings, e.g. stairs, floors7%
A41DOuterwear3%
A42BHats3%
A61FFilters implantable into blood vessels3%
A62BDevices, apparatus or methods for life-saving3%
B05CApparatus for applying fluent materials to surfaces, in general3%
E04BGeneral building constructions3%
E04CStructural elements3%
PatentTitleYear
10,041,243Modular building unit, system and method20187,967,000'Low pressure paintball guns'20117,635,018'System for controlling a roller shade fabric to a desired linear speed'20097,537,040'Control system for uniform movement of multiple roller shades'20097,281,565'System for controlling roller tube rotational speed for constant linear shade speed'20077,240,716'System for coupling roller shade tubes'20077,063,124'System for securing a shade fabric to a roller tube'20067,051,782'System for coupling roller shade tubes'20066,896,366'Goggles'20056,845,806'Roller shade weighting assembly'20056,729,497'Paintball container'2004D0484926'Paintball marker grip frame'2004D0473910'Paintball marker grip frame'20036,361,432'Air diffuser with air flow regulator'20025,920,808'Method and apparatus for reducing key-up distortion by pre-heating transistors'19995,732,333'Linear transmitter using predistortion'19985,694,085'High-power amplifier using parallel transistors'19975,567,192'Method and apparatus for processing electron gas discharge tubing'19965,232,504'Modular and adjustable glue dispenser'19935,069,040'Coil bypass arrangement'1991Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1991–2002Based in Dallas, TX, US· patent location history
1993Patents assigned to BAUMFOLDER CORP (1)· patent assignee history
1996Patents assigned to CUMMINGS INC (1)· patent assignee history
1997–1999Patents assigned to GLENAYRE ELECTRONICS INC (3)· patent assignee history
1997–1999Based in Palmyra, MO, US· patent location history
2003–2005Patents assigned to NPF LTD (4)· patent assignee history
2003–2011Based in Staffordshire, GB· patent location history
2005–2009Patents assigned to LUTRON ELECTRONICS CO (7)· patent assignee history
2005–2009Based in Whitehall, PA, US· patent location history
2018Based in Pretoria, ZA· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| LUTRON ELECTRONICS CO | 7 | 2005–2009 |
| NPF LTD | 4 | 2003–2005 |
| GLENAYRE ELECTRONICS INC | 3 | 1997–1999 |
| BAUMFOLDER CORP | 1 | 1993 |
| CUMMINGS INC | 1 | 1996 |
Locations
| Location | Patents | Span |
|---|---|---|
| Whitehall, Pennsylvania, US | 7 | 2005–2009 |
| Staffordshire, GB | 3 | 2003–2011 |
| Palmyra, MO, US | 3 | 1997–1999 |
| Dallas, Texas, US | 2 | 1991–2002 |
| Pretoria, ZA | 1 | 2018 |