Stair Tread, Step Or Ladder Rung Patents (Class D25/69)
  • Stairway step assembly
    Patent number: 5924249
    Abstract: A stairway step assembly for use as an aid in climbing a stairway. The assembly is particularly useful to elderly and handicapped users who have difficulty climbing a standard stairway due to the height or rise of the steps thereof. The assembly provides a means of quickly, economically, and safely altering the step arrangement of the standard stairway with minimal or no modification to the permanent structure of the stairway. The assembly comprises a plurality of step members having predetermined horizontal dimensions and a predetermined height which is approximately one-half the height or rise distance of a standard step. The assembly further comprises an attachments mechanism for connecting the step members in place on the top or horizontal section of standard steps.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: July 20, 1999
    Assignee: Protector Car, Inc.
    Inventors: William P Kroll, Paul C Probst, Karl J F Kroll
  • Stairway step assembly
    Patent number: 5664379
    Abstract: A stairway step assembly for use as an aid in climbing a stairway. The assembly is particularly useful to elderly and handicapped users who have difficulty climbing a standard stairway due to the height or rise of the steps thereof. The assembly provides a means of quickly, economically, and safely altering the step arrangement of the standard stairway with minimal or no modification to the permanent structure of the stairway. The assembly comprises a plurality of step members having predetermined horizontal dimensions and a predetermined height which is approximately one-half the height or rise distance of a standard step. The assembly further comprises an attachments mechanism for connecting the step members in place on the top or horizontal section of standard steps.
    Type: Grant
    Filed: December 28, 1995
    Date of Patent: September 9, 1997
    Assignee: Protector Care, Inc.
    Inventors: William P. Kroll, Paul C. Probst, Karl J. F. Kroll
  • Stairtread facings and a co-extrusion method for their manufacture
    Patent number: 4840824
    Abstract: A stairtread facing consists essentially of a strip of friction material and a location member therefor. The strip of friction material is a co-extrusion with at least a part of the location member which rests on a stair, and both friction material and location member are made of rubber or plastics material.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: June 20, 1989
    Assignee: Ferodo, Inc.
    Inventor: Robert J. Davis
  • Spiral staircase
    Patent number: D251805
    Type: Grant
    Filed: May 19, 1977
    Date of Patent: May 8, 1979
    Inventor: Thomas R. Allmand
  • Tree climbing step
    Patent number: D254272
    Type: Grant
    Filed: December 8, 1977
    Date of Patent: February 19, 1980
    Inventor: Gerald T. Having
  • Fire ladder rung
    Patent number: D254630
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: April 1, 1980
    Assignee: Rival Manufacturing Company
    Inventors: James B. Aberer, John W. Breeden, Richard J. Ostroski
  • Cover for a step
    Patent number: D256618
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: August 26, 1980
    Assignee: Contempo Campers, Inc.
    Inventor: Miles Klein
  • Ladder step
    Patent number: D258839
    Type: Grant
    Filed: August 30, 1978
    Date of Patent: April 7, 1981
    Assignee: Ronald A. Minichillo
    Inventor: Wayne R. Broyles
  • Mat for a bathing facility or the like
    Patent number: D259608
    Type: Grant
    Filed: May 11, 1979
    Date of Patent: June 23, 1981
    Assignee: American Standard Inc.
    Inventors: Henry M. Stairs, Jr., Jan Leviton
  • Folding cabinet step
    Patent number: D260683
    Type: Grant
    Filed: May 15, 1979
    Date of Patent: September 8, 1981
    Inventor: Vera Kokoska
  • Portable detachable step for mounting on bumpers of vehicles
    Patent number: D263131
    Type: Grant
    Filed: February 7, 1980
    Date of Patent: February 23, 1982
    Assignee: Marco Mfg., Inc.
    Inventor: Mark T. Mitchell
  • Portable detachable step for connecting to the front bumper of a vehicle
    Patent number: D263132
    Type: Grant
    Filed: February 7, 1980
    Date of Patent: February 23, 1982
    Assignee: Marco Mfg., Inc.
    Inventor: Mark T. Mitchell
  • Wall inserted step or hand box
    Patent number: D266593
    Type: Grant
    Filed: July 13, 1978
    Date of Patent: October 19, 1982
    Inventor: Wilhelm Nelles
  • Playground equipment step
    Patent number: D271786
    Type: Grant
    Filed: October 28, 1981
    Date of Patent: December 13, 1983
    Inventors: Gerald Beekenkamp, Donald Curtis
  • Step plate
    Patent number: D272430
    Type: Grant
    Filed: January 28, 1982
    Date of Patent: January 31, 1984
    Assignee: Kemberly, Inc.
    Inventors: Ronald A. Minichillo, Wayne R. Broyles
  • Step plate
    Patent number: D279607
    Type: Grant
    Filed: December 27, 1982
    Date of Patent: July 9, 1985
    Assignee: Elkhart Machine & Tool Co.
    Inventor: Thomas M. Rutter
  • Extension ladder stepdeck
    Patent number: D281626
    Type: Grant
    Filed: May 23, 1983
    Date of Patent: December 3, 1985
    Inventor: Richard A. Dyer
  • Portable half-step stairway unit
    Patent number: D287283
    Type: Grant
    Filed: September 21, 1983
    Date of Patent: December 16, 1986
    Inventor: Paul R. Johnson
  • Extrusion for ladder step
    Patent number: D291006
    Type: Grant
    Filed: October 15, 1984
    Date of Patent: July 21, 1987
    Assignee: Kemberly, Inc.
    Inventors: Ronald A. Minichillo, Wayne R. Broyles
  • Tree step
    Patent number: D297169
    Type: Grant
    Filed: October 28, 1985
    Date of Patent: August 9, 1988
    Inventor: Joseph F. Trani, Sr.
  • Manhole step
    Patent number: D304376
    Type: Grant
    Filed: September 29, 1987
    Date of Patent: October 31, 1989
    Assignee: Lane International Corporation
    Inventor: Michael K. Robertson
  • Tree climber
    Patent number: D324130
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: February 25, 1992
    Assignee: Matsumoto Industry Co., Ltd.
    Inventors: Shinsuke Matsumoto, Hideo Shibata
  • Stair step for a platform
    Patent number: D326159
    Type: Grant
    Filed: December 6, 1989
    Date of Patent: May 12, 1992
    Assignee: Ronningen Research & Development Company
    Inventor: Jon H. Eickhoff
  • Step for a portable riser assembly
    Patent number: D341431
    Type: Grant
    Filed: January 30, 1992
    Date of Patent: November 16, 1993
    Assignee: Wenger Corporation
    Inventors: John H. Kniefel, Eugene N. Reshanov, Johannes N. Gaston
  • Ladder step
    Patent number: D343692
    Type: Grant
    Filed: July 15, 1992
    Date of Patent: January 25, 1994
    Assignee: Vepe Ky
    Inventor: Paavo Rainio
  • Tree climber
    Patent number: D351030
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: September 27, 1994
    Assignee: Outback Products, Inc.
    Inventors: Michael K. Laughlin, Jerry K. Laughlin, Victor A. Laughlin
  • Edging strip for tiled steps
    Patent number: D363785
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: October 31, 1995
    Assignee: McKechnie UK Limited
    Inventor: Alan J. E. Davies
  • Tile edging strip
    Patent number: D363788
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: October 31, 1995
    Assignee: McKechnie UK Limited
    Inventor: Malcolm Caley
  • Tile edging strip
    Patent number: D363996
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: November 7, 1995
    Assignee: McKechnie UK Limited
    Inventor: Alan Davies
  • Tile edging strip
    Patent number: D364233
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: November 14, 1995
    Assignee: McKechnie UK Limited
    Inventor: Malcolm Caley
  • Tile edging strip
    Patent number: D364234
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: November 14, 1995
    Assignee: McKechnie UK Limited
    Inventor: Malcolm Caley
  • Ladder rung
    Patent number: D371854
    Type: Grant
    Filed: August 12, 1994
    Date of Patent: July 16, 1996
    Assignee: BRK Brands, Inc.
    Inventors: Patrick Douglas, Don Jursich, Kenneth R. Fenne
  • Tree climbing implement
    Patent number: D385045
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: October 14, 1997
    Inventor: Daniel C. Vanselous
  • Prefabricated step unit for swimming pools
    Patent number: D385970
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: November 4, 1997
    Assignee: Waterair Industries
    Inventor: Andre Cholley
  • Stair tread having a slip-resistant surface
    Patent number: D389588
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: January 20, 1998
    Assignee: Harsco Corporation
    Inventor: Robert T. Dunk
  • Ladder step extender
    Patent number: D390669
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: February 10, 1998
    Inventors: Donald R. Armstrong, Phillip F. Bolf
  • Step unit for a modular spiral staircase
    Patent number: D398063
    Type: Grant
    Filed: October 22, 1997
    Date of Patent: September 8, 1998
    Inventor: Anthony M. Kline
  • Pivoting metal foot-step for a steel tower
    Patent number: D406906
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: March 16, 1999
    Assignee: Nihon Gaishi Seisen Kogyo Co., Ltd.
    Inventor: Toru Kinoshita
  • Lattice shelf
    Patent number: D408665
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: April 27, 1999
    Inventors: Judy Von Gunten, Lin King-yin
  • Ladder step extender
    Patent number: D409765
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: May 11, 1999
    Inventors: Donald R. Armstrong, Phillip F. Bolf
  • Detachable step member
    Patent number: D409887
    Type: Grant
    Filed: July 29, 1998
    Date of Patent: May 18, 1999
    Inventor: Robert J. Mason
  • Scaffold step
    Patent number: D412754
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: August 10, 1999
    Inventor: Danny Harden
  • Stair tread surface
    Patent number: D415289
    Type: Grant
    Filed: March 26, 1997
    Date of Patent: October 12, 1999
    Assignee: Wooster Products, Inc.
    Inventor: Namen G. Dalton
  • Portable tree step
    Patent number: D417012
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: November 23, 1999
    Inventors: Joseph F. Davenport, Robert J. Mantz
  • Step riser
    Patent number: D424707
    Type: Grant
    Filed: March 11, 1999
    Date of Patent: May 9, 2000
    Inventor: Ezell Shackelford