PETER GRASSMANN

Overview

About

PETER GRASSMANN has a total of 18 patent applications. Its first patent ever was published in 1925. It filed its patents most often in Germany, United States and United Kingdom. Its main competitors in its focus markets audio-visual technology, electrical machinery and energy and packaging and shipping are HUANG XINMIN, D & B AUDIOTECHNIK AG and IMMERSION TECHNOLOGY PROPERTY.

Patent filings in countries

#	Industry
#1	Audio-visual technology
#2	Electrical machinery and energy
#3	Packaging and shipping
#4	Machines

#	Technology
#1	Loudspeakers and microphones
#2	Capacitors and switching devices
#3	Containers for goods storage
#4	Unspecified technologies
#5	Special information storage
#6	Dynamo-electric machines

#	Name	Total Patents
#1	Grassmann Peter	4
#2	Peter Grassmann	3

Publication	Filing date	Title
US2001459A	1933-10-24	Electric variable condenser
GB406615A	1933-10-16	Improvements in or relating to electric variable condensers
US1962012A	1933-04-05	Electrodynamic loud speaker
US1632287A	1925-03-20	Loud speaker for wireless telephony and other purposes
GB248176A	1925-02-27	Improvements in and relating to loud speakers for wireless telephony and other purposes