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US190342A
(en)
|
|
1877-05-01 |
|
Improvement in fire-escapes |
|
US1196419A
(en)
|
1915-12-21 |
1916-08-29 |
Henry F Banyovits |
Foldable fire-escape.
|
|
US1301734A
(en)
|
1917-11-08 |
1919-04-22 |
Helen A Patterson |
Fire-escape.
|
|
US1816702A
(en)
|
1928-06-16 |
1931-07-28 |
Joseph L Small |
Fire escape ladder
|
|
US1859984A
(en)
|
1930-10-02 |
1932-05-24 |
Reese John |
Folding fire escape ladder
|
|
US2223980A
(en)
|
1938-02-10 |
1940-12-03 |
Harvey C Zent |
Fire escape
|
|
US2887261A
(en)
|
1957-11-15 |
1959-05-19 |
Roy L Mcguire |
Collapsible fire escape ladder
|
|
US3075612A
(en)
|
1961-07-17 |
1963-01-29 |
Combined Ind Inc |
Emergency escape ladder
|
|
US3315762A
(en)
|
1965-03-25 |
1967-04-25 |
Samuel S Torrey |
Collapsible ladder
|
|
US3307654A
(en)
|
1965-08-02 |
1967-03-07 |
Jack C Green |
Emergency fire escape apparatus
|
|
US3385399A
(en)
|
1966-07-27 |
1968-05-28 |
J. Douglas Burt |
Ladder and hanger frame assembly, and reversibility and portability features therein
|
|
DE2059544C3
(en)
|
1970-12-03 |
1974-06-27 |
Albert 7445 Bempflingen Hess |
Folding ladder or collapsible pole
|
|
US3696888A
(en)
|
1971-07-08 |
1972-10-10 |
Fred L Brandenberger |
Combination portable fire escape and wardrobe support
|
|
US3727724A
(en)
|
1971-11-01 |
1973-04-17 |
J Gilbert |
Fire escape ladder
|
|
US3834492A
(en)
|
1973-08-27 |
1974-09-10 |
American La France Inc |
Portable fire escape ladder
|
|
US3907064A
(en)
|
1973-11-02 |
1975-09-23 |
Hans Erik Svalberg |
Extendable escape ladder
|
|
US3858683A
(en)
|
1974-01-30 |
1975-01-07 |
Zurn Ind Inc |
Boarding ladder
|
|
US3946834A
(en)
|
1975-02-27 |
1976-03-30 |
Simon Shafer |
Self storing fire escape ladder
|
|
US4143741A
(en)
|
1977-12-30 |
1979-03-13 |
Woodstream Corporation |
Portable escape ladder
|
|
US4157130A
(en)
|
1978-03-24 |
1979-06-05 |
Rival Manufacturing Company |
Fire ladder and method of constructing same
|
|
SU751948A1
(en)
|
1978-07-21 |
1980-07-30 |
Всесоюзный Научно-Исследовательский И Проектный Институт |
Detachable ladder
|
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CA1117923A
(en)
|
1979-09-11 |
1982-02-09 |
Alexander S. Kiss |
Web ladder release mechanism
|
|
US4434871A
(en)
|
1983-03-03 |
1984-03-06 |
Niedworok Johannes F |
Emergency escape ladder
|
|
US4531612A
(en)
|
1984-09-17 |
1985-07-30 |
Sandor Jules A |
Escape ladder
|
|
US4709783A
(en)
|
1984-12-29 |
1987-12-01 |
Lonseal |
Apparatus for installing escape device for slowly lowering a body
|
|
US4655318A
(en)
|
1985-10-04 |
1987-04-07 |
H. Bowen Company, Inc. |
Step assembly
|
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JPH065518Y2
(en)
|
1986-07-30 |
1994-02-09 |
三山工業株式会社 |
Lifting leg
|
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USD304376S
(en)
|
1987-09-29 |
1989-10-31 |
Lane International Corporation |
Manhole step
|
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US4867275A
(en)
|
1988-05-05 |
1989-09-19 |
Islava Steven T |
Escape ladder
|
|
US4869342A
(en)
|
1988-10-31 |
1989-09-26 |
Clay & Bailey Mfg. Co., Inc. |
Drive in manhole step
|