Inventor
Douglas A. Johnson
Inventor
Groveland, MA, US
Overview
Patents· 29 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
Y10Sprimary
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
G06FElectric digital data processing7%
B29CShaping or joining of plastics5%
B29LIndexing scheme associated with subclass b29c, relating to particular articles5%
B65BMachines, apparatus or devices for, or methods of, packaging articles or materials5%
B65GTransport or storage devices, e.g. conveyors for loading or tipping, shop conveyor systems or pneumatic tube conveyors5%
H04LTransmission of digital information, e.g. telegraphic communication5%
H04WWireless communication networks5%
B01DSeparation4%
H05BElectric heating4%
PatentTitleYear
10,947,764Door closer diagnostics system202110,021,751Lighting system and method for PWM adjustable current control20189,836,422System and method for data conversion2017D0781207'Vehicle rooftop'20178,914,001'Simple network database protocol'20148,536,734'Apparatus for inverting DC voltage to AC voltage'20138,526,876'Targeted satellite radio advertising using mobile network determined location'20138,348,731'Adaptive cooling method for computer rack enclosure'20138,213,968'Method and system of targeted alert distribution'20127,945,204'Targeted satellite radio advertising using mobile network determined location'20117,281,381'Mechanical-thermal solar power system'2007D0542884'Rod holder'20077,076,036'Traffic and capacity modeling process'20067,065,941'Induction foil cap sealer'20066,732,495'Induction foil cap sealer'20046,629,399'Induction foil cap sealer employing litz wire coil'20036,566,634'Induction driven power supply for circuits accompanying portable heated items'20036,547,220'Open loop control with velocity threshold for pneumatic hoist'20036,540,647'Water rehabilitation device'20036,534,753'Backup power supply charged by induction driven power supply for circuits accompanying portable heated container'20036,412,252'Slotted induction heater'20026,149,808'Disposable paint strainer'20005,556,003'Hand-held personal defense apparatus'19965,463,778'User controlled trap handler'19955,327,567'Method and system for returning emulated results from a trap handler'19945,152,013'Versatile tandem belt'19925,125,978'Water displacement composition and a method of use'19925,089,152'Water displacement composition'19924,742,511'Method and apparatus for routing packets in a multinode computer interconnect network'1988Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1988–1995Based in Carrollton, TX, US· patent location history
1992–2014Patents assigned to JOHNSON DOUGLAS A (6)· patent assignee history
1992–2000Based in Farmington, MN, US· patent location history
1992Based in Stillwater, MN, US· patent location history
2002–2006Patents assigned to KAPS ALL PACKAGING SYSTEMS INC (4)· patent assignee history
2002–2018Based in Groveland, MA, US· patent location history
2003–2013Patents assigned to WILMINGTON RES AND DEV CORP (4)· patent assignee history
2006–2014Patents assigned to SPRINT COMMUNICATIONS CO (4)· patent assignee history
2006–2014Based in Overland Park, KS, US· patent location history
2012–2014Patents assigned to JOSEPH ROY (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| JOHNSON DOUGLAS Aself | 6 | 1992–2014 |
| KAPS ALL PACKAGING SYSTEMS INC | 4 | 2002–2006 |
| SPRINT COMMUNICATIONS CO | 4 | 2006–2014 |
| WILMINGTON RES AND DEV CORP | 4 | 2003–2013 |
| JOSEPH ROY | 3 | 2012–2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Groveland, Massachusetts, US | 11 | 2002–2018 |
| Overland Park, KS, US | 5 | 2006–2014 |
| Carrollton, Texas, US | 3 | 1988–1995 |
| Farmington, Minnesota, US | 2 | 1992–2000 |
| Stillwater, Minnesota, US | 2 | 1992 |