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PHILADELPHIA STORAGE BATTERY

Overview
  • Total Patents
    124
About

PHILADELPHIA STORAGE BATTERY has a total of 124 patent applications. Its first patent ever was published in 1912. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets electrical machinery and energy, environmental technology and machines are WILLARD STORAGE BATTERY CO, BRUCE FORD and NAT BATTERY CO.

Patent filings in countries

World map showing PHILADELPHIA STORAGE BATTERYs patent filings in countries
# Country Total Patents
#1 United States 100
#2 Canada 13
#3 United Kingdom 11

Patent filings per year

Chart showing PHILADELPHIA STORAGE BATTERYs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Holland Walter E 43
#2 Grimditch William H 18
#3 Skinner James M 17
#4 Pearson Lawrence J 10
#5 Brown Jr Reynolds D 6
#6 Holland Walter Elam 6
#7 Earnshaw David P 4
#8 Bowman John M 3
#9 Skinner James Mortimer 3
#10 Pearson Lawrence James 2

Latest patents

Publication Filing date Title
US2120884A Regulator system
GB443001A Ignition noise suppressor system for vehicle radio receivers
US2090538A Variable band coupling device for superheterodyne radio receivers
US2153583A High fidelity radio receiver
US2100236A Intercarrier noise suppressor
GB455031A Improvements in voltage control devices for electric supply systems
GB450965A Improvements in antennae for radio receiving systems and the like
GB448045A Improved methods and apparatus for suppressing noise in automobile radio receivers
GB444760A Variable band coupling device for superheterodyne radio receivers
GB443435A Improvements in sound reproducing devices
GB441469A Improvements in radio receivers
GB441612A Improvements in radio-receivers
US2018605A Means for packing articles within packing boxes
US1995227A Coil winding machine
US2010758A Electrolytic condenser insulation
US1989015A Method of making sound reproducing diaphragms
US1975745A Electric phonograph
US1932343A Radio loud speaker cabinet
US2035295A Radio tube socket
US2086465A Automatic volume control system