Inventor
C. David Hale
Inventor
Wilmington, OH, US
Overview
Patents· 8 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B08Bprimary
B08BCleaning in general38%
E03FSewers31%
C07KPeptides8%
F16CShafts8%
F16DCouplings for transmitting rotation8%
Y10TTechnical subjects covered by former us classification8%
PatentTitleYear
9,009,906'Motorized drain cleaning machine'20158,615,837'Motorized drain cleaning machine with speed controller'20137,891,038'Sewer cleaning machine'20117,757,332'Sewer cleaning machine'20107,222,383'Torque limiting drive pulley for a belt driven drain cleaning machine'20075,875,508'Hydrostatic sewer cleaning machine'19995,786,176'Recombinant CDw52 antigen'19984,887,929'Cable coupler'1989Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1989–1999Patents assigned to ELECTRIC EEL MANUFACTURING CO (2)· patent assignee history
1989–2015Based in Wilmington, OH, US· patent location history
1998Patents assigned to BRITISH TECH GROUP (1)· patent assignee history
1998Based in Breckenham, GB· patent location history
2007–2013Patents assigned to HALE C DAVID (2)· patent assignee history
2010–2011Patents assigned to ELECTRIC EEL MFG CO INC (2)· patent assignee history
2013–2015Patents assigned to ELECTRIC EEL MFG COMPANY INC (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| ELECTRIC EEL MANUFACTURING CO | 2 | 1989–1999 |
| ELECTRIC EEL MFG CO INC | 2 | 2010–2011 |
| ELECTRIC EEL MFG COMPANY INC | 2 | 2013–2015 |
| HALE C DAVIDself | 2 | 2007–2013 |
| BRITISH TECH GROUP | 1 | 1998 |
Locations
| Location | Patents | Span |
|---|---|---|
| Wilmington, OH, US | 7 | 1989–2015 |
| Breckenham, GB | 1 | 1998 |