MARSHALL CHARLES P

Overview

Total Patents

12

About

MARSHALL CHARLES P has a total of 12 patent applications. Its first patent ever was published in 1909. It filed its patents most often in United States and Canada. Its main competitors in its focus markets audio-visual technology, optics and furniture and games are NEOVICTORY TECHNOLOGY CO LTD, VARIBEL B V and HANGZHOU SHUANGWANYUE ELECTRONIC TECH CO LTD.

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Patent filings in countries

World map showing MARSHALL CHARLES Ps patent filings in countries

#	Country	Total Patents
#1	United States	7
#2	Canada	5

Patent filings per year

Chart showing MARSHALL CHARLES Ps patent filings per year from 1900 to 2020

Similar Companies

NEOVICTORY TECHNOLOGY CO LTD 94% similarity

VARIBEL B V 92% similarity

HANGZHOU SHUANGWANYUE ELECTRONIC TECH CO LTD 92% similarity

BELTONE HEARING AID COMPANY 92% similarity

DANAVOX AS 90% similarity

VICTORION TECHNOLOGY CO LTD 90% similarity

SHENZHEN VOXTECH CO LTD 90% similarity

DYNA MAGNETIC DEVICES INC 90% similarity

OTARION INC 89% similarity

FREEBIT AS 89% similarity

Focus industries

#	Industry
#1	Audio-visual technology
#2	Optics
#3	Furniture and games

Focus technologies

#	Technology
#1	Loudspeakers and microphones
#2	Sanitary equipment
#3	Special information storage
#4	Spectacles

Top inventors

#	Name	Total Patents
#1	Marshall Charles P	12
#2	Bragger John W	1

Latest patents

Publication	Filing date	Title
US1433637A	1920-03-15	Diffracting screen
CA185798A	1917-07-26	Phonograph counterbalance
CA185797A	1917-05-07	Talking machinery
CA185796A	1917-01-02	Talking machinery
US1235041A	1916-12-11	Counterbalance.
US1231277A	1916-11-23	Tone-purifier.
CA185795A	1916-08-21	Talking machinery
US1214050A	1916-04-24	Tone-purifier for talking-machines.
CA184838A	1916-04-22	Tone purifier for talking machines
US1199197A	1915-08-31	Tone-purifier for talking-machines.
US1189152A	1915-04-20	Tone-purifier.
US960363A	1909-10-27	Paper-holder.