Learn more

ROCKWOOD SPRINKLER CO MASSACHUSETTS

Overview
  • Total Patents
    54
About

ROCKWOOD SPRINKLER CO MASSACHUSETTS has a total of 54 patent applications. Its first patent ever was published in 1915. It filed its patents most often in United States, Canada and France. Its main competitors in its focus markets machines, civil engineering and machine tools are ROCKWOOD SPRINKLER CO, ROCKWOOD SYSTEMS CORP and CONRAN WILLIAM F.

Patent filings in countries

World map showing ROCKWOOD SPRINKLER CO MASSACHUSETTSs patent filings in countries
# Country Total Patents
#1 United States 34
#2 Canada 13
#3 France 4
#4 United Kingdom 3

Patent filings per year

Chart showing ROCKWOOD SPRINKLER CO MASSACHUSETTSs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Carlson Hjalmar G 14
#2 Rockwood George I 5
#3 Howard Clifton P 5
#4 Howard Clifton Perry 4
#5 Freeman Howard G 3
#6 Peter Lofgren 3
#7 Arnott Ashley M 2
#8 Lofgren Peter 2
#9 Benson Emil M 2
#10 Clayton Kendall Horace 2

Latest patents

Publication Filing date Title
GB628465A Improvements in or relating to methods and apparatus for foam generation
US2472008A Deluge valve
GB567133A Improvements in or relating to valves
GB564199A Improvements in or relating to nozzles for generating fog
US2199142A Sprinkler
US2135138A Automatic sprinkler and deflector therefor
US2019134A Sprinkler alarm mechanism
US1968648A Sprinkler alarm switch
US1898537A Restricted orifice device
US1968563A Method of making a female pipe coupling member
US1891541A Control device for alarm mechanism
US1891540A Control device for alarm mechanism
US1861777A Dry pipe exhauster
US1990264A Sprinkler alarm mechanism
US1819098A Water motor
US1968562A Female pipe coupling member
US1905115A Seating ring for pipe couplings
US1861817A Air exhauster
US1819124A Heat actuated mechanism
US1909123A Locking member for sprinkler heads