Inventor
Edwin L. Johnson
Inventor
Issaquah, WA, US
Overview
Patents· 14 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
Y10Tprimary
Y10TTechnical subjects covered by former us classification16%
A61KPreparations for medical, dental or toiletry purposes10%
C08BPolysaccharides10%
F16KValves10%
A61LMethods or apparatus for sterilising materials or objects in general6%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations6%
A23JProtein compositions for foodstuffs3%
A23LFoods, foodstuffs or non-alcoholic beverages, not otherwise provided for3%
A24DCigars3%
A44BButtons, pins, buckles, slide fasteners, or the like3%
PatentTitleYear
10,502,237Method and system for attenuating transmission of high amplitude oscillations by a vacuum system20199,964,230Retarder control valve assembly and system for rail cars20189,732,876'Retarder control valve assembly and system for rail cars'20178,106,030'Hemostatic material'20128,039,449'Hemostatic material'20117,981,872'Hemostatic material'20116,130,321'High tap density chitosan, and methods of production'20005,960,821'Flow sensor device and associated vacuum holding system'19994,199,496'Process for the recovery of chemicals from the shells of crustacea'19804,195,175'Process for the manufacture of chitosan'19804,159,932'Process for activating chitin by microwave treatment and improved activated chitin product'19794,066,735'Process for demineralization of crustacea shells'19784,018,678'Method of and apparatus for fluid filtration and the like with the aid of chitosan'19774,001,920'Quick-disconnect buckle'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1980Patents assigned to PENISTON QUINTIN P (5)· patent assignee history
1977–1980Patents assigned to JOHNSON EDWIN L (4)· patent assignee history
1977–2012Patents assigned to JOHNSON EDWIN LEE (3)· patent assignee history
1977–2000Based in Issaquah, WA, US· patent location history
1977Based in Jackson, WI, US· patent location history
1980Based in Seattle, WA, US· patent location history
1999–2019Based in Ballwin, MO, US· patent location history
2011–2012Patents assigned to MEDTRADE PRODUCTS LTD (2)· patent assignee history
2011–2012Based in Sammamish, WA, US· patent location history
2017–2019Patents assigned to EDCO USA (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| PENISTON QUINTIN P | 5 | 1977–1980 |
| JOHNSON EDWIN Lself | 4 | 1977–1980 |
| EDCO USA | 3 | 2017–2019 |
| JOHNSON EDWIN LEEself | 3 | 1977–2012 |
| MEDTRADE PRODUCTS LTD | 2 | 2011–2012 |
Locations
| Location | Patents | Span |
|---|---|---|
| Issaquah, Washington, US | 5 | 1977–2000 |
| Ballwin, MO, US | 4 | 1999–2019 |
| Sammamish, Washington, US | 3 | 2011–2012 |
| Seattle, Washington, US | 1 | 1980 |
| Jackson, WI, US | 1 | 1977 |