Inventor
Joseph L. Johnson
Inventor
Houston, TX, US
Overview
Patents· 8 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling36%
Y10TTechnical subjects covered by former us classification27%
A61KPreparations for medical, dental or toiletry purposes9%
A61MDevices for introducing media into, or onto, the body9%
F42BExplosive charges, e.g. for blasting, fireworks, ammunition9%
G01NInvestigating or analysing materials by determining their chemical or physical properties9%
PatentTitleYear
7,464,763'Method of injecting lift gas and gas lift flow control device'20087,115,097'Positive airway pressure notification system for treatment of breathing disorders during sleep'20064,931,286'High gloss cellulose tablet coating'19904,625,941'Gas lift valve'19864,572,052'Declipper/feeder'19864,320,657'Particulate flowmeter'19824,014,386'Subsurface safety valve apparatus'19773,978,922'Gas storage well safety valve apparatus'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1977Patents assigned to SCHLUMBERGER TECHNOLOGY CORP (2)· patent assignee history
1976–1986Based in Houston, TX, US· patent location history
1982Patents assigned to ICI AMERICA INC (1)· patent assignee history
1986Patents assigned to PRIESS JOHNSON OIL TOOLS INTER (1)· patent assignee history
1986Based in Canadian, OK, US· patent location history
1990Patents assigned to AQUALON CO (1)· patent assignee history
1990Based in Newark, DE, US· patent location history
2006Patents assigned to JOHNSON JOSEPH L (1)· patent assignee history
2006Based in Knoxville, TN, US· patent location history
2008Based in Lafayette, LA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SCHLUMBERGER TECHNOLOGY CORP | 2 | 1976–1977 |
| AQUALON CO | 1 | 1990 |
| ICI AMERICA INC | 1 | 1982 |
| JOHNSON JOSEPH Lself | 1 | 2006 |
| PRIESS JOHNSON OIL TOOLS INTER | 1 | 1986 |
Locations
| Location | Patents | Span |
|---|---|---|
| Houston, Texas, US | 3 | 1976–1986 |
| Lafayette, LA, US | 1 | 2008 |
| Knoxville, TN, US | 1 | 2006 |
| Newark, Delaware, US | 1 | 1990 |
| Canadian, OK, US | 1 | 1986 |