Learn more

SPERRY PROD INC

Overview
  • Total Patents
    420
About

SPERRY PROD INC has a total of 420 patent applications. Its first patent ever was published in 1924. It filed its patents most often in United States, United Kingdom and Germany. Its main competitors in its focus markets measurement, transport and machines are SPERRY RAIL INC, BEIJING LEAD TIME SCIENCE & TECH CO LTD and SPERRY RAIL INTERNATIONAL LTD.

Patent filings in countries

World map showing SPERRY PROD INCs patent filings in countries
# Country Total Patents
#1 United States 287
#2 United Kingdom 92
#3 Germany 25
#4 Austria 5
#5 France 5
#6 Switzerland 3
#7 Canada 1
#8 Denmark 1
#9 Spain 1

Patent filings per year

Chart showing SPERRY PROD INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Drake Harcourt C 76
#2 Henry Elliott A 22
#3 De Lanty Loren J 17
#4 Perry Walter M 16
#5 Valkenburg Howard E Van 13
#6 Sperry Jr Elmer A 12
#7 Firestone Floyd A 11
#8 Lano Jr Ralph B De 10
#9 Carter Leslie F 10
#10 Lester Jones George 9

Latest patents

Publication Filing date Title
US3057188A Ultrasonic mechanical impedance measuring device
US3050989A Carrier technique for wide rance ultrasonic inspection
US3019636A Ultrasonic inspection and measuring means
US3038102A Thyratron impulse generator
US3074268A Temperature compensation for transmission through liquid
US3036231A High resolution piezoelectric transducer
US3004425A Signal-transmitting and receiving system
GB829524A Liquid level indicator
GB838922A Ultrasonic inspection
GB838921A Ultrasonic inspection
US3033029A Amplifier gain compensator for variable ultrasonic signal response
US2937522A Ultrasonic rail weld scanner
US3077107A Signal storage display equipment for ultrasonic testing
US2925552A Rail flaw detector mechanism
US3004424A Tandem piezoelectric transducers
US2985009A Differential acoustic transducer
US2883861A Liquid level indicator
US2958818A Rail flaw detector mechanism
US2889514A Rail flaw detector mechanism
US2884592A Method and means for detecting flaws in rails