Inventor

H. Carl Walther

Inventor

Landenberg, PA, US

Overview

1980–2009

Patent span

Mechanical engineering

Primary field (CPC F)

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C10Mprimary

C10MLubricating compositions13%

C10NIndexing scheme associated with subclass c10m relating to lubricating compositions13%

F16NLubricating13%

F23JRemoval or treatment of combustion products or combustion residues13%

F28GCleaning of internal or external surfaces of heat-exchange or heat-transfer conduits, e.g. water tubes or boilers13%

G04GElectronic time-pieces13%

H01JElectric discharge tubes or discharge lamps13%

H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems13%

PatentTitleYear

Assembled from patent assignee/location history and declaration credentials.

1980–1984Patents assigned to VDO SCHINDLING (2)· patent assignee history

1980–1984Based in Wiesbaden-Nordenstadt, DE· patent location history

2003Patents assigned to DU PONT (1)· patent assignee history

2003–2009Based in Landenberg, PA, US· patent location history

2009Patents assigned to BAND THOMAS MICHAEL (1)· patent assignee history

2009Patents assigned to HOWELL JON LEE (1)· patent assignee history

2009Patents assigned to WALTHER H CARL (1)· patent assignee history

Assignee and location history derived from the patent record.

Assignees

Locations

Location	Patents	Span
Landenberg, Pennsylvania, US	2	2003–2009
Wiesbaden-Nordenstadt, DE	2	1980–1984