Inventor

Volker Wittwer

Inventor

Freiburg, DE

Overview

4→

Patents

1981–2002

Patent span

Physics

Primary field (CPC G)

Patents· 4 as inventor

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

G02Fprimary

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein57%

C03CChemical composition of glasses, glazes or vitreous enamels14%

C09KMaterials for miscellaneous applications, not provided for elsewhere14%

G01NInvestigating or analysing materials by determining their chemical or physical properties14%

PatentTitleYear

6,496,295'Glazing element'2002 5,916,972'Material having temperature-defendant light transmission'1999 5,864,994'Glazing element, in particular for facing building facades'1999 4,264,147'Indicator device having electro-optical light valve unit'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981Patents assigned to SIEMENS AG (1)· patent assignee history

1981–2002Based in Freiburg, DE· patent location history

1999–2002Patents assigned to FRAUNHOFER GES FORSCHUNG (2)· patent assignee history

1999Patents assigned to BASF AG (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
FRAUNHOFER GES FORSCHUNG	2	1999–2002
BASF AG	1	1999
SIEMENS AG	1	1981

Locations

Location	Patents	Span
Freiburg, DE	4	1981–2002