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SLEEPER & HARTLEY INC

Overview
  • Total Patents
    87
About

SLEEPER & HARTLEY INC has a total of 87 patent applications. Its first patent ever was published in 1914. It filed its patents most often in United States, United Kingdom and Germany. Its main competitors in its focus markets machine tools, machines and mechanical elements are INNOVATECH INTERNAT SA, SPRING MACHINERY COMPANY and WUENSCH ADOLF.

Patent filings in countries

World map showing SLEEPER & HARTLEY INCs patent filings in countries
# Country Total Patents
#1 United States 64
#2 United Kingdom 10
#3 Germany 7
#4 France 5
#5 Japan 1

Patent filings per year

Chart showing SLEEPER & HARTLEY INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Sleeper Frank H 27
#2 Michel Nigro 13
#3 Blount William H 12
#4 Fisher Clayton F 6
#5 Halvorsen Elmer W 4
#6 Thomas Percival S 3
#7 Franks Jr Edward E 2
#8 Sleeper Frank Henry 2
#9 Horton James A 1
#10 Henry Blount William 1

Latest patents

Publication Filing date Title
US3351101A Wire forming machine
US3028904A Wire coiling machine and looper
US3069024A Machine for looping coil springs
GB780829A Wire coiling machine
US2831570A Wire coiling machine having cams for holding the feed rolls separated
US2792869A Wire coiling machine having an accurate wire feeding mechanism
US2281756A Wire cutting machine
US2289597A Pneumatic vise
US2288988A Apparatus for cutting cables and other long articles
GB528499A Improvements in wire coiling machine
US2175426A Wire-coiling machine
US2192260A Wire coiling machine
US2242022A Cable armoring machine
US2163019A Wire coiling machine
GB483455A Improvements in machines for bending wire
FR826507A Universal machine for the production of spiral springs
GB476221A Improvements in wire coiling or like machines
US2151417A Power driving mechanism
US2096605A Universal spring coiling machine
US2092934A Pneumatic pump