Inventor
David C. Johnson
Inventor
Portland, OR, US
Overview
Patents· 37 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B41Jprimary
B41JTypewriters24%
B63BShips or other waterborne vessels5%
A61LMethods or apparatus for sterilising materials or objects in general3%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry3%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form3%
B65DContainers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers3%
C02FTreatment of water, waste water, sewage, or sludge3%
C08BPolysaccharides3%
C08HDerivatives of natural macromolecular compounds3%
C08LCompositions of macromolecular compounds3%
PatentTitleYear
9,982,962Air gun with multiple energy sources20189,914,787'Elastomeric, hydrogen-resistant biopolymer and its use in oil and gas and hydrogen gas piping and transportation'20189,528,656'Elastomeric, hydrogen-resistant biopolymer and its use in oil and gas refining, and in the storage and transport of hydrogen gas'20169,053,684'Guitar neck adjustment'20158,984,790'Adjustable cheek rest'20158,866,698'Multi-display handheld device and supporting system'2014D0611557'Water sport device'20107,156,491'Separable key for establishing detachable printer component compatibility with a printer'20077,000,558'Modular floating swim platforms'20066,969,148'Pivoting on-axis ink reservoir for inkjet printer'20056,827,432'Replaceable ink container for an inkjet printing system'20046,805,066'Modular floating swim platform'20046,779,874'Device for ensuring proper toe-heel installation of a detachable printer component'20046,755,516'Latch and handle arrangement for a replaceable ink container'20046,729,714'Separable key for establishing detachable printer component compatibility with a printer'20046,676,426'Electrical connector with baised positioning'20046,551,148'Electrical connector with minimized non-target contact'20036,508,547'Replaceable ink container for an inkjet printing system'20036,488,369'Ink container configured to establish reliable electrical and fluidic connections to a receiving station'20026,460,985'Ink reservoir for an inkjet printer'20026,431,697'Replaceable ink container having a separately attachable latch and method for assembling the container'20026,406,766'Active oxygen scavenger packaging'20026,375,315'Replaceable ink container for an inkjet printing system'20026,365,247'Zero oxygen permeation plastic bottle for beer and other applications'20026,302,535'Ink container configured to establish reliable electrical connection with a receiving station'20016,293,665'Dual capillarity ink accumulator for ink-jet'20016,131,532'Inflatable sailboat'20006,039,443'Apparatus and method of priming ink supply tubes in an ink jet printer'20006,019,459'Dual capillarity ink accumulator for ink-jet'20005,720,051'Inflatable multiple cell helmet liner to enhance fit, security and comfort'19985,662,693'Mobility assist for the paralyzed, amputeed and spastic person'19974,983,813'Submersible aquarium heater with adjustable electronic thermostatic control'19914,598,741'Barrier vapor control system'19864,510,556'Electronic lighting apparatus for simulating a flame'1985D0260095'Slush dispenser'19814,116,630'Sterilization method'19784,102,645'Sterilization apparatus'1978Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1978–1981Based in Ambler, PA, US· patent location history
1985–2014Patents assigned to JOHNSON DAVID C (3)· patent assignee history
2000–2003Patents assigned to HEWLETT PACKARD CO (9)· patent assignee history
2000–2007Based in Portland, OR, US· patent location history
2000–2010Based in White Salmon, WA, US· patent location history
2002Patents assigned to BP CORP NORTH AMERICA INC (2)· patent assignee history
2003–2007Patents assigned to HEWLETT PACKARD DEVELOPMENT CO (8)· patent assignee history
2015–2018Based in New London, NH, US· patent location history
2016–2018Patents assigned to ARROWHEAD CENTER INC (2)· patent assignee history
2016–2018Based in Las Cruces, NM, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HEWLETT PACKARD CO | 9 | 2000–2003 |
| HEWLETT PACKARD DEVELOPMENT CO | 8 | 2003–2007 |
| JOHNSON DAVID Cself | 3 | 1985–2014 |
| ARROWHEAD CENTER INC | 2 | 2016–2018 |
| BP CORP NORTH AMERICA INC | 2 | 2002 |
Locations
| Location | Patents | Span |
|---|---|---|
| Portland, OR, US | 17 | 2000–2007 |
| White Salmon, Washington, US | 4 | 2000–2010 |
| Ambler, Pennsylvania, US | 3 | 1978–1981 |
| New London, NH, US | 2 | 2015–2018 |
| Las Cruces, NM, US | 2 | 2016–2018 |