Inventor
George L. Sommerfeld
Inventor
Minneapolis, MN, US
Overview
Patents· 7 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B01Dprimary
B01DSeparation27%
A47LDomestic washing or cleaning18%
A61BDiagnosis18%
LOC2418%
E01HStreet cleaning9%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%
PatentTitleYear
7,300,405'Analysis of auscultatory sounds using single value decomposition'2007D0477874'Electronic stethoscope'2003D0477405'Electronic stethoscope chestpiece'20035,453,094'Kit assembly for use during a laparoscopic surgical procedure'19954,345,353'Filtering device'19824,258,451'Surface sweeping machine'19814,032,307'Method and apparatus for cleaning filter means'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1982Patents assigned to TENNANT CO (3)· patent assignee history
1977–1982Based in Minneapolis, MN, US· patent location history
1995Patents assigned to MINNESOTA MINING & MFG (1)· patent assignee history
1995Based in Shoreview, MN, US· patent location history
2003Based in St. Paul, MN, US· patent location history
2007Patents assigned to 3M INNOVATIVE PROPERTIES CO (1)· patent assignee history
2007Patents assigned to UNIV MINNESOTA (1)· patent assignee history
2007Based in Brainerd, MN, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| TENNANT CO | 3 | 1977–1982 |
| 3M INNOVATIVE PROPERTIES CO | 1 | 2007 |
| MINNESOTA MINING & MFG | 1 | 1995 |
| UNIV MINNESOTA | 1 | 2007 |
Locations
| Location | Patents | Span |
|---|---|---|
| Minneapolis, Minnesota, US | 3 | 1977–1982 |
| St. Paul, Minnesota, US | 2 | 2003 |
| Brainerd, Minnesota, US | 1 | 2007 |
| Shoreview, Minnesota, US | 1 | 1995 |