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HAMMON JAMES H

Overview
  • Total Patents
    18
About

HAMMON JAMES H has a total of 18 patent applications. Its first patent ever was published in 1916. It filed its patents most often in United States and Canada. Its main competitors in its focus markets optics, machines and machine tools are UNIVIS CORP, WELLS JOEL C and LISSAC GEORGES.

Patent filings in countries

World map showing HAMMON JAMES Hs patent filings in countries
# Country Total Patents
#1 United States 11
#2 Canada 7

Patent filings per year

Chart showing HAMMON JAMES Hs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Optics
#2 Machines
#3 Machine tools

Top inventors

# Name Total Patents
#1 Hammon James H 18

Latest patents

Publication Filing date Title
US2405826A Multifocal ophthalmic lens blank
US2177022A Fused multifocal ophthalmic lens and blank for making the same
US2177021A Fused multifocal ophthalmic lens and blank for making the same
US2006638A Multifocal ophthalmic lens and blank therefor
US2029480A Multifocal ophthalmic lens and blank therefor
US2029479A Multifocal ophthalmic lens and blank therefor
US2021778A Ophthalmic lens and method of making the same
US2065132A Multifocal ophthalmic lens and blank and method of making the same
US1740298A Spectacle lens
US1354040A Spectacle-lens
US1239268A Tool and work holder and driver.
CA448924A Multifocal ophthalmic lens blank
CA356091A Multifocal lens manufacture
CA322397A Spectacle lens
CA203882A Spectacle lense
CA360591A Opthalmic lens
CA374156A Multifocal lens and blank
CA452738A Method of making multifocal opthalmic lens blanks