|
US475935A
(en)
|
|
1892-05-31 |
|
Extension-ladder |
|
US515783A
(en)
|
|
1894-03-06 |
|
Extension-ladder |
|
US281977A
(en)
|
|
1883-07-24 |
|
Adjustable ladder |
|
US202426A
(en)
|
|
1878-04-16 |
|
Improvement in extension-ladders |
|
US840365A
(en)
|
1904-02-18 |
1907-01-01 |
Irwin Doan J |
Ladder.
|
|
US799782A
(en)
|
1904-09-06 |
1905-09-19 |
John G Ellinger |
Ladder-support.
|
|
US886737A
(en)
|
1906-06-11 |
1908-05-05 |
Aiken C Taylor |
Extension step-ladder.
|
|
US1385319A
(en)
|
1920-04-14 |
1921-07-19 |
Martin F Enke |
Ladder
|
|
US1521814A
(en)
|
1924-04-09 |
1925-01-06 |
Houska Frank |
Safety attachment for ladders
|
|
US1811722A
(en)
|
1929-05-11 |
1931-06-23 |
William Henry Beatty |
Ladder
|
|
US1812119A
(en)
|
1929-05-31 |
1931-06-30 |
Albert Mori |
Universal ladder
|
|
US2007057A
(en)
|
1934-08-10 |
1935-07-02 |
Mcneal Alexander |
Stepladder
|
|
US2129401A
(en)
|
1937-09-09 |
1938-09-06 |
Botinger Fred |
Flexible utility ladder
|
|
US2471110A
(en)
|
1947-08-19 |
1949-05-24 |
Jenkins John |
Ladder for hanging paper
|
|
US2574286A
(en)
|
1948-06-12 |
1951-11-06 |
Edmund C Rein |
Ladder brace
|
|
US2584197A
(en)
|
1949-11-08 |
1952-02-05 |
Herbert L Garner |
Convertible ladder
|
|
US2887260A
(en)
|
1957-05-06 |
1959-05-19 |
Roxton C Mckinnie |
Combination step and extension ladder
|
|
US2934163A
(en)
|
1957-10-23 |
1960-04-26 |
Casimer S Ladewski |
Ladder attachment
|
|
US3288248A
(en)
|
1965-01-13 |
1966-11-29 |
Steven D Gurian |
Pool ladder
|
|
US3374860A
(en)
|
1966-05-02 |
1968-03-26 |
Lyle F. Stewart |
Self-leveling ladder attachment
|
|
US3508628A
(en)
|
1968-10-17 |
1970-04-28 |
Charles J Conrad |
Ladder with stabilizer means
|
|
US3933221A
(en)
|
1971-12-17 |
1976-01-20 |
Sorenson Virgil H |
Ladder adjusting and stabilizing apparatus
|
|
US3768592A
(en)
*
|
1972-06-07 |
1973-10-30 |
L Higgins |
Multi-purpose ladder assembly
|
|
IT1020513B
(en)
|
1973-09-24 |
1977-12-30 |
Fasano O |
LEVELING DEVICE D SUPPORT FOR ITALIAN STAIRS WITH EXTENSION AND STAND
|
|
CA1064872A
(en)
|
1976-09-27 |
1979-10-23 |
Douglas A. Chantler |
Ladder stabilizing device
|
|
US4069893A
(en)
|
1976-11-18 |
1978-01-24 |
Charles David Blackstone |
Ladder stabilizer and leveler
|
|
CA1072926A
(en)
|
1978-10-20 |
1980-03-04 |
George R. Mair |
Adjustable ladder support
|
|
US4207886A
(en)
|
1979-04-13 |
1980-06-17 |
Sorenson Virgil H |
Ladder adjusting and stabilizing apparatus
|
|
EP0033475B2
(en)
|
1980-02-02 |
1989-05-03 |
Kümmerlin, Helga |
Double ladder
|
|
GB2099060B
(en)
|
1981-05-16 |
1985-09-18 |
Kings Roger |
An attachment for a ladder
|
|
US4520896A
(en)
|
1981-05-18 |
1985-06-04 |
Disston Horace C |
Foldable ladder
|
|
US4483415A
(en)
|
1981-05-18 |
1984-11-20 |
Disston Horace C |
Folding stepladder
|
|
SE429989B
(en)
|
1982-02-18 |
1983-10-10 |
Tor Ronning |
WORK Platform Console
|
|
GB8318772D0
(en)
|
1983-07-12 |
1983-08-10 |
Holt J C |
Ladder stabilisers
|
|
FR2563566B1
(en)
*
|
1984-04-25 |
1987-06-26 |
Stoltz Gerard |
FOLDABLE STEP
|
|
US4565262A
(en)
|
1984-06-29 |
1986-01-21 |
Stanley E. Hawkins |
Ladder apparatus
|
|
GB2166793B
(en)
|
1984-11-10 |
1987-09-23 |
Ian Simpson |
Stabilizing means for ladders
|
|
US4669576A
(en)
|
1986-04-30 |
1987-06-02 |
Jones Leroy W |
Safety ladder foot
|
|
US4798262A
(en)
|
1986-09-12 |
1989-01-17 |
Paul Margolies |
Tripodal support
|
|
US4723629A
(en)
|
1987-02-13 |
1988-02-09 |
Vernon M. Vanden Hoek |
Extension ladder with auxiliary extension leg and supporting legs
|
|
US4807720A
(en)
|
1988-01-15 |
1989-02-28 |
Kim Soon Y |
Ladder leveling attachment
|
|
GB2218451B
(en)
|
1988-05-11 |
1991-10-09 |
Beldray Ltd |
Step ladder
|
|
US4899849A
(en)
|
1988-12-05 |
1990-02-13 |
A. C. Innovations, Inc. |
Ladder stabilizer
|
|
US4971167A
(en)
|
1989-11-20 |
1990-11-20 |
Winnard Keith E |
Ladder support apparatus
|
|
US4949809A
(en)
|
1989-12-07 |
1990-08-21 |
A. C. Innovations, Inc. |
Extendable pole locking mechanism for ladder stabilizer
|
|
US5033584A
(en)
|
1990-03-02 |
1991-07-23 |
Battle Harold P |
All-purpose ladder
|
|
US5086876A
(en)
|
1991-04-26 |
1992-02-11 |
Severson Gary E |
Foot actuated ladder brace
|
|
US5165501A
(en)
|
1991-07-25 |
1992-11-24 |
Donahey Howard E |
Ladder support attachment
|
|
US5195610A
(en)
*
|
1992-05-04 |
1993-03-23 |
Wan Li Chang |
Bidirectionally foldable step ladder
|
|
US5267631A
(en)
|
1992-09-03 |
1993-12-07 |
Mendel Gary S |
Scaffold stabilizer apparatus
|
|
US5507364A
(en)
|
1993-07-14 |
1996-04-16 |
Spevak; Stephen T. |
Ladder leveler
|
|
US5335754A
(en)
|
1993-07-22 |
1994-08-09 |
Ross Gibson |
Self-levelling ladder
|
|
US5341899A
(en)
|
1994-02-03 |
1994-08-30 |
Casamento Michael J |
Anti-skid and leveling device for ladders
|
|
US5423397A
(en)
|
1994-08-01 |
1995-06-13 |
Boughner; Raymond B. |
Ladder stabilizer
|
|
US5590739A
(en)
|
1994-11-01 |
1997-01-07 |
High; Dewayne A. |
Adjustable extension stepladder
|
|
US5551529A
(en)
|
1994-11-21 |
1996-09-03 |
Molitor; Daniel J. |
Ladder stabilizer
|
|
US5522473A
(en)
|
1995-01-11 |
1996-06-04 |
Moselsky; William |
Ladder stabilizing device
|
|
CA2154392A1
(en)
*
|
1995-12-01 |
1997-06-02 |
Richard Orchowski |
Ladder step
|
|
USD413681S
(en)
|
1998-06-10 |
1999-09-07 |
Zumwalt Mark W |
Scaffold unit
|
|
DE19836977C2
(en)
|
1998-08-14 |
2001-08-30 |
Horst Laug |
Anti-slip protection for a ladder
|
|
US6019191A
(en)
|
1999-02-26 |
2000-02-01 |
Flores; Leonard A. |
Ladder support system
|
|
US6450290B1
(en)
|
2000-06-05 |
2002-09-17 |
George E. Spak |
Folding ladder
|
|
US6533071B1
(en)
|
2000-12-29 |
2003-03-18 |
Winston Smith |
Ladder with incorporated stabilizers
|
|
US6688426B1
(en)
|
2002-03-02 |
2004-02-10 |
Harry Mikros |
Wheel extension and lift device for ladders
|
|
US6595326B1
(en)
|
2002-05-01 |
2003-07-22 |
Donald L. Dean |
Ladder leveling device
|
|
US7017711B1
(en)
|
2002-10-23 |
2006-03-28 |
Shaikh Mehboob Ali |
Method for extending the leg of a ladder and apparatus therefor
|
|
US6959785B1
(en)
|
2003-10-24 |
2005-11-01 |
Chilton Wade J |
Stabilizing system for ladders and scaffolding
|
|
US6948591B2
(en)
|
2003-12-12 |
2005-09-27 |
Jon Robert Scott |
Support apparatus or accessory for a ladder
|
|
US20060272899A1
(en)
|
2005-06-02 |
2006-12-07 |
Wei-Hao Chang |
Ladder
|
|
US7163084B1
(en)
|
2005-06-07 |
2007-01-16 |
Blehm Berle G |
Adjustable ladder stabilizer
|
|
US7487859B2
(en)
|
2005-09-14 |
2009-02-10 |
Sheng-Shih Wang |
Combination hand truck ladder
|
|
US20110067954A1
(en)
|
2005-10-20 |
2011-03-24 |
Clifton Deal |
Ladder Safety Device
|
|
US20070181370A1
(en)
|
2006-02-06 |
2007-08-09 |
Stephen Kemp-Banks |
Stabilized ladder
|
|
USD576290S1
(en)
*
|
2006-05-09 |
2008-09-02 |
Cosco Management, Inc. |
Step ladder
|
|
US7293630B1
(en)
|
2006-05-10 |
2007-11-13 |
Frank Trebec |
Ladder stabilization device
|
|
USD565745S1
(en)
|
2006-06-09 |
2008-04-01 |
Cosco Management, Inc. |
Step stool
|
|
US20080000720A1
(en)
|
2006-06-28 |
2008-01-03 |
John Porch |
Ladder anchoring system
|
|
US8127890B2
(en)
|
2007-04-10 |
2012-03-06 |
Cosco Management, Inc. |
Flat-fold step stool
|
|
CA2598594A1
(en)
|
2007-08-08 |
2009-02-08 |
Daniel Mcmurray |
Ladder stabilizer
|
|
US20090107765A1
(en)
|
2007-10-30 |
2009-04-30 |
Clyde Germond |
Extension ladder stabilizer
|
|
US20100147623A1
(en)
|
2008-12-17 |
2010-06-17 |
Pocos Kevin L |
Ladder stabilization system
|
|
US8365865B2
(en)
|
2009-03-03 |
2013-02-05 |
Wing Enterprises, Inc. |
Adjustable ladders and related methods
|
|
US8002084B2
(en)
|
2009-03-18 |
2011-08-23 |
Chin Yin Huang |
Stepladder
|
|
US8640827B2
(en)
|
2010-06-04 |
2014-02-04 |
Justin B. Breithaupt, JR. |
Adjustable scaffold base
|
|
USD650915S1
(en)
|
2010-10-20 |
2011-12-20 |
Louisville Ladder Inc. |
Brace for a step of a stepladder
|