Inventor · Horrem, DE

Norbert Rolff

20Patents

4h-index

20Co-inventors

63Inventor score

Filing activity: Jun 1, 1994 → Feb 13, 2020

Most-cited inventions

Patent	Title	Area	Cited by	Status
US5770956A	Measurement amplifier	Physics	11	Expired
US6474172B1	Method for measuring the gas pressure in a container, and devices for its application	Physics	9	Expired
US8171773B2	Sniffing leak detector	Physics	5	Active
US8752412B2	Sniffing leak detector	Physics	4	Active
US8117886B2	Leak detector with a leak detector testing device	Physics	4	Active
US5543706A	Circuit and method for measuring current in a circuit	Physics	3	Expired
US10309862B2	Film chamber with measuring volume for gross leak detection	Physics	3	Active
US7444854B2	Leak indicator with test leak and test leak for integration into a leak detector	Physics	3	Active
US7415829B2	Piston compressor	Mechanical Engineering; Lighting; Heating	2	Expired
US9810597B2	Sniffer leak detector with multi-stage membrane pump	Mechanical Engineering; Lighting; Heating	2	Active
US8302454B2	Method for calibrating a mass spectrometric sniffing leak detector	Physics	1	Active
US11320337B2	Method for leak testing with a foil chamber with vented measurement volume	Physics	1	Active
US8893543B2	Leak detection method	Physics	1	Active
US10900862B2	Gross leak measurement in an incompressible test item in a film chamber	Physics	1	Active
US10837857B2	Gas leak search using a test gas spray device	Physics	0	Active
US9147561B2	Method for determining the maximum mass peak in mass spectrometry	Electricity	0	Active
US8416091B2	Sniffing probe	Physics	0	Expired
US11630024B2	Method for leak testing using a film chamber with ventilated measuring volume	Physics	0	Active
US11754525B2	Gas detector with an ionizing device	Electricity	0	Active
US9530634B2	Device for supplying voltage to the cathode of a mass spectrometer	Electricity	0	Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.