HP Forums

Full Version: HP calc patents (list)
You're currently viewing a stripped down version of our content. View the full version with proper formatting.

delphion offeres a one day free trial via the google ads. There you can download these:
US03380031__.pdf ->Non-HP; very interesting calculator

US03588873__.pdf ->Information Display Apparatus

US03623156A1.pdf

US03641328A1.htm

US03668697__.pdf ->Noncontacting Keyboard (used in desktop calcs)

US03675213__.pdf

US03678466__.pdf

US03693162__.pdf

US03711690A1.pdf ->Calculator and tester thereof

US03737871A1.pdf

US03749899__.pdf ->Binary/BCD ALU

US03750105A1.pdf

US03755697__.pdf

US03757068__.pdf

US03766370A1.pdf ->Cordic CPU

US03769621A1.pdf

US03781820__.pdf

US03825736__.pdf

US03839630__.pdf

US03855461__.pdf

US03859635__.pdf

US03863060__.pdf

US03892958__.pdf

US03893173__.pdf ->Card reader

US03941953__.pdf ->Tactile feedback keyboard

US03946218__.pdf

US03955074__.pdf

US03967370__.pdf ->Keyboard/switch manufacturing

US03971925__.pdf

US03973110__.pdf

US03976926__.pdf

US03986186__.pdf

US03987290__.pdf

US03996562__.pdf

US03997765__.pdf

US04000389__.pdf

US04001569__.pdf

US04009379__.pdf

US04012725__.pdf

US04028538__.pdf

US04035627__.pdf

US04037092__.pdf

US04047012__.pdf

US04052604__.pdf ->binary adder

US04054788__.pdf

US04055757__.pdf

US04059750__.pdf

US04063221__.pdf

US04075679__.pdf

US04078257__.pdf ->Calc with electronically alterable key symbols

US04089059__.pdf

US04091270__.pdf ->Calc with Bar code reader

US04099246__.pdf

US04106677__.pdf

US04109315__.pdf ->HP-01

US04126898__.pdf

US04127897__.pdf

US04143809__.pdf

US04145742__.pdf

US04145752__.pdf

US04152769__.pdf

US04152770__.pdf

US04152771__.pdf

US04152773__.pdf

US04152774__.pdf

US04156282__.pdf

US04156285__.pdf

US04156917__.pdf

US04156918__.pdf

US04156921__.pdf

US04158228__.pdf

US04158231__.pdf

US04158233__.pdf

US04158285__.pdf ->HP-01

US04159525__.pdf

US04161031__.pdf

US04162532__.pdf

US04164019__.pdf

US04164039__.pdf

US04172281__.pdf ->Microprogrammable Control Processor

US04177518__.pdf

US04177520__.pdf

US04178633__.pdf

US04180854__.pdf

US04181965__.pdf

US04181966__.pdf

US04187547__.pdf

US04197586__.pdf

US04198684__.pdf

US04203152__.pdf

US04232382__.pdf ->HP-01

US04281390__.pdf

US04291385__.pdf

US04309761__.pdf

US04314112__.pdf

US04322816__.pdf

US04330839__.pdf

US04366553__.pdf

US04381554__.pdf

US04384328__.pdf

US04412300__.pdf

US04424563__.pdf

US04437156__.pdf

US04455607__.pdf

US04455618__.pdf

US04456964__.pdf

US04460974__.pdf

US04480305__.pdf

US04546448__.pdf

US04566072__.pdf

US04571702__.pdf

US04587630__.pdf

US04611307__.pdf

US04615015__.pdf

US04623982__.pdf

US04649478__.pdf

US04654787__.pdf

US04682015__.pdf

US04700325__.pdf

US04705444__.pdf

US04763242__.pdf

US04821228__.pdf

US04825058__.pdf

US04845652__.pdf

US04847474__.pdf

US04852057__.pdf

US04868745__.pdf

US04885714__.pdf

US04947364__.pdf

US05010502__.pdf

US05020012__.pdf

US05025364__.pdf

US05025403__.pdf

US05034598__.pdf

US05036454__.pdf

US05045992__.pdf

US05065356__.pdf

US05067102__.pdf

US05075792__.pdf

US05075847__.pdf

US05083267__.pdf

US05086504__.pdf

US05089980__.pdf

US05128887__.pdf

US05134898__.pdf

US05150118__.pdf

US05155697__.pdf

US05166899__.pdf

US05175700__.pdf

US05175828__.pdf

US05185856__.pdf

US05202994__.pdf

US05216627__.pdf

US05258748__.pdf

US05260886__.pdf

USD0244862__.pdf

USD0245107__.pdf

USD0245810__.pdf

USD0249090__.pdf

USD0249243__.pdf

USD0249244__.pdf

USD0256133__.pdf

USD0321865__.pdf

USD0333129__.pdf

USRE032040__.pdf ->Elec. alterable key symbols

Thanks for the list. There's also an open-source tool,
pat2pdf, to obtain patent PDFs:

http://www.tothink.com/pat2pdf/

One can comment out the line that removes the raw
TIFF images, too, so patent pages can be fed to OCR tools.

Cheers,
Peter Monta