Learn more

HOUGHTON MIFFLIN CO

Overview
  • Total Patents
    18
About

HOUGHTON MIFFLIN CO has a total of 18 patent applications. Its first patent ever was published in 1983. It filed its patents most often in United States and Canada. Its main competitors in its focus markets computer technology and machines are ANALOG DESIGN AUTOMATION INC, ANGLIN MATTHEW J and PATTERSON R HUGO.

Patent filings in countries

World map showing HOUGHTON MIFFLIN COs patent filings in countries
# Country Total Patents
#1 United States 10
#2 Canada 8

Patent filings per year

Chart showing HOUGHTON MIFFLIN COs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Kucera Henry 18
#2 Carus Alwin B 6
#3 Russom Jacqueline 2
#4 Hopkins Jeffrey G 2
#5 Sokolowski Rachael 2
#6 Kaufman Ilia 1

Latest patents

Publication Filing date Title
US4864502A Sentence analyzer
US4868750A Collocational grammar system
US4864501A Word annotation system
CA1257705A Textual database system using skeletonization and phonetic replacement to retrieve words matching or similar to query words
US4773009A Method and apparatus for text analysis
US4771401A Apparatus and method for linguistic expression processing
US4730269A Method and apparatus for generating word skeletons utilizing alpha set replacement and omission
US4674066A Textual database system using skeletonization and phonetic replacement to retrieve words matching or similar to query words
US4724523A Method and apparatus for the electronic storage and retrieval of expressions and linguistic information
US4783758A Automated word substitution using numerical rankings of structural disparity between misspelled words & candidate substitution words
US4580241A Graphic word spelling correction using automated dictionary comparisons with phonetic skeletons