LexDanaLexDanabeta
Inventor

Siegfried Hollmann

Inventor
Darmstadt, DE

Overview

2→
Patents
1985–1988
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 2 as inventor

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

A45Dprimary
A45DHairdressing or shaving equipment25%
A61NElectrotherapy13%
F21LLighting devices or systems thereof, being portable or specially adapted for transportation13%
F21VFunctional features or details of lighting devices or systems thereof13%
F21WIndexing scheme associated with subclasses f21k, f21l, f21s and f21v, relating to uses or applications of lighting devices or systems13%
F26BDrying solid materials or objects by removing liquid therefrom13%
G05DSystems for controlling or regulating non-electric variables13%
PatentTitleYear
4,744,154'Measuring and controlling the moisture content of hair'19884,541,442'Heat treatment apparatus for heating human hair on the head'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985–1988Patents assigned to WELLA AG (2)· patent assignee history
1985–1988Based in Darmstadt, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
WELLA AG21985–1988
Locations
LocationPatentsSpan
Darmstadt, DE21985–1988