Inventor
Peter W. Cheung
Inventor
Mercer Island, WA, US
Overview
Patents· 7 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
A61Bprimary
A61BDiagnosis44%
G01NInvestigating or analysing materials by determining their chemical or physical properties33%
H01HElectric switches11%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests11%
PatentTitleYear
6,541,723'Cover for a rotary switch'20035,259,381'Apparatus for the automatic calibration of signals employed in oximetry'19935,074,977'Digital biosensors and method of using same'1991D0317501'Pulse oximeter'19914,913,150'Method and apparatus for the automatic calibration of signals employed in oximetry'19904,892,101'Method and apparatus for offsetting baseline portion of oximeter signal'19904,819,646'Feedback-controlled method and apparatus for processing signals used in oximetry'1989Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1989–1993Patents assigned to PHYSIO CONTROL CORP (4)· patent assignee history
1989–1993Based in Mercer Island, WA, US· patent location history
1991Patents assigned to SIMED CORP (1)· patent assignee history
1991Patents assigned to WASHINGTON TECH CENTER (1)· patent assignee history
2003Patents assigned to TOWER MFG CORP (1)· patent assignee history
2003Based in Kowloon, HK· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| PHYSIO CONTROL CORP | 4 | 1989–1993 |
| SIMED CORP | 1 | 1991 |
| TOWER MFG CORP | 1 | 2003 |
| WASHINGTON TECH CENTER | 1 | 1991 |
Locations
| Location | Patents | Span |
|---|---|---|
| Mercer Island, Washington, US | 6 | 1989–1993 |
| Kowloon, HK | 1 | 2003 |