LexDanaLexDanabeta
Inventor

Norbert Rolff

Inventor
Kerpen-Horrem, DE

Overview

17→
Patents
1996–2021
Patent span
Physics
Primary field (CPC G)

Patents· 17 as inventor

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

G01Mprimary
G01MTesting static or dynamic balance of machines or structures48%
G01LMeasuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure9%
G01RMeasuring electric variables9%
H01JElectric discharge tubes or discharge lamps9%
H03FAmplifiers9%
F04BPositive-displacement machines for liquids4%
F04DNon-positive-displacement pumps4%
F25BRefrigeration machines, plants or systems4%
G06GAnalogue computers4%
PatentTitleYear
10,900,862Gross leak measurement in an incompressible test item in a film chamber202110,837,857Gas leak search using a test gas spray device202010,309,862Film chamber with measuring volume for gross leak detection20199,810,597'Sniffer leak detector with multi-stage membrane pump'20179,530,634'Device for supplying voltage to the cathode of a mass spectrometer'20169,147,561'Method for determining the maximum mass peak in mass spectrometry'20158,893,543'Leak detection method'20148,752,412'Sniffing leak detector'20148,416,091'Sniffing probe'20138,302,454'Method for calibrating a mass spectrometric sniffing leak detector'20128,171,773'Sniffing leak detector'20128,117,886'Leak detector with a leak detector testing device'20127,444,854'Leak indicator with test leak and test leak for integration into a leak detector'20087,415,829'Piston compressor'20086,474,172'Method for measuring the gas pressure in a container, and devices for its application'20025,770,956'Measurement amplifier'19985,543,706'Circuit and method for measuring current in a circuit'1996

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1996–1998Patents assigned to LEYBOLD AG (2)· patent assignee history
1996–2016Based in Kerpen-Horrem, DE· patent location history
2008–2021Patents assigned to INFICON GMBH (13)· patent assignee history
2012–2014Patents assigned to ROLFF NORBERT (6)· patent assignee history
2012–2014Patents assigned to WETZIG DANIEL (3)· patent assignee history
2012–2013Patents assigned to ROLFF RANDOLF (2)· patent assignee history
2012–2019Based in Kerpen, DE· patent location history
2020–2021Based in Cologne, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
INFICON GMBH132008–2021
ROLFF NORBERTself62012–2014
WETZIG DANIEL32012–2014
LEYBOLD AG21996–1998
ROLFF RANDOLF22012–2013
Locations
LocationPatentsSpan
Kerpen-Horrem, DE111996–2016
Kerpen, DE42012–2019
Cologne, DE22020–2021