lunedì 21 maggio 2018

PRECEDENTI STORICI-Historical precedents of innovation

Ci sono molti brevetti precedenti a quello di Frank P. Pettit e quindi il suo brevetto si può definire come una innovazione dei precendenti, e non come una vera e propria invenzione.

Publication number
Priority date
Publication date
Assignee
Title
US305147A 

1884-09-16

Electric railroad
US477240A 

1892-06-21

John h
US890852A
1908-01-28
1908-06-16
Wilhelm Ellingen
Carriage for ropeways.
US903656A 
1907-10-29
1908-11-10
Moss W Beardsley
Cable-adjuster.
US1065976A 
1912-07-17
1913-07-01
Ole Slette
Litter-carrier.
US1137040A
1913-11-13
1915-04-27
George H Weber
Overhead carrier.
US1305415A

1919-06-03

steffens
US1313358A 

1919-08-19

w atkins
US1431536A 
1922-01-21
1922-10-10
Maloney William
Light railway
DE479861C 
1927-04-22
1929-08-02
Franz Kruckenberg Dipl Ing
Role current collector having a plurality of two opposing sides of a bus bar in contact with current collector rollers
US1776765A 
1926-08-05
1930-09-23
Oilgear Co
Feed brake for milling machines and the like
US1853570A 
1927-09-10
1932-04-12
Firm Adolf Bleichert & Co A G
Car for passenger ropeways
US1860241A 
1929-09-19
1932-05-24
Galko Paul
Elevated electric railway
DE609175C 
1932-09-17
1935-02-08
Foerderanlagen Heckel
Device for Pendelseilhaengebahnen with two load equal proportions pulling tension cables
US2018087A 
1932-04-28
1935-10-22
William C Plass
Means of transportation
US2102784A 
1936-02-06
1937-12-21
Socony Vacuum Oil Co Inc
Method of making a wear indicating tire
US2140585A 
1936-11-25
1938-12-20
American Steel & Wire Co
Rope tramway
US2228411A 
1940-01-16
1941-01-14
Leslie M Sheridan
Hydraulic drive for motor vehicles
US2582201A 
1948-04-03
1952-01-08
Samuel S Huntington
Ski lift
US2630074A
1948-04-19
1953-03-03
Robert W Pointer
Cable connector
US2639676A 
1950-12-04
1953-05-26
Paul N Travis
Cable supported propelling device
US2803486A 
1954-11-12
1957-08-20
Victor S Larson
Hook for logging arch cable
US2949864A 
1956-04-23
1960-08-23
Forderanlagen Ernst Heckel M B
Cable railway for passengers
US3067695A 
1958-07-10
1962-12-11
Shea Patrick Hall
Aerial cable connector assembly

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