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T H SYMINGTON AND SON INC

Overview
  • Total Patents
    23
About

T H SYMINGTON AND SON INC has a total of 23 patent applications. Its first patent ever was published in 1925. It filed its patents most often in United States. Its main competitors in its focus markets transport, machines and civil engineering are BALTIMORE JOURNAL BOX COMPANY, HENNESSY JAMES J and SYMINGTON T H & SON INC.

Patent filings in countries

World map showing T H SYMINGTON AND SON INCs patent filings in countries
# Country Total Patents
#1 United States 23

Patent filings per year

Chart showing T H SYMINGTON AND SON INCs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Symington Thomas H 9
#2 Drenning Percy R 8
#3 Cyrus Hankins 6
#4 Martin Mark H 3

Latest patents

Publication Filing date Title
US1821296A Truck bolster with spring supported side bearings
US1633503A Truck bolster with absorption mechanism
US1747971A Side frame and journal-box mounting
US1701558A Side-frame and journal-box mounting
US1732133A Absorption mechanism
US1731470A Railway-car-truck bolster
US1818362A Spring retaining means
US1788130A Bolster
US1773244A Bolster
US1775951A Bolster
US1732102A Truck bolster and side bearing
US1848282A Bolster with lateral motion devices
US1891583A Truck bolster
US1888940A Equalizing bolster
US1670143A Bolster for railway cars
US1716332A Car-door-locking device
US1697557A Door-securing device
US1764165A Railway-car-truck spring
US1764163A Railway-car-truck spring
US1764720A Railway-car-truck spring