Class E04F : FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
Subclass 11/09: Stairways, ramps, or like structures (mounting or marking-off stairways E04F 21/26; of temporary construction E04G 27/00); Balustrades; Handrails (ladders permanently attached to fixed structures E06C 9/00) Stairways; Layouts thereof Tread-and-riser units
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11970865 | Modular staircase systems | Nov 05, 19 | Apr 30, 24 | CB Interests Inc. |
| 11692356 | Fully-assembled staircase system and assembly method | May 26, 20 | Jul 04, 23 | CHANGZHOU VOCATIONAL INSTITUTE OF ENGINEERING |
| 11406184 | Snap lock system, method and use for connecting construction elements | Dec 21, 18 | Aug 09, 22 | Humeneq AS |
| 11332942 | System and method for automating construction and installation of surfaces in construction | Jul 19, 19 | May 17, 22 | Form Robotics Inc. |
| 10738474 | Stackable step component with adjustable tread incline | Nov 09, 19 | Aug 11, 20 | Not available |
| 10260239 | Wedge tread stair box system | Jul 27, 17 | Apr 16, 19 | Convert-A-Stair, L.L.C. |
| 10106986 | Curved pathway | Dec 11, 17 | Oct 23, 18 | Not available |
| 9840847 | Curved staircase | Sep 02, 16 | Dec 12, 17 | Not available |
| 9816274 | Stair case | Aug 28, 14 | Nov 14, 17 | CLICKSTAIR PTY LTD |
| 9347224 | Step-block precast stair | Mar 06, 15 | May 24, 16 | UMM AL-QURA UNIVERSITY |
| 9309675 | Stairway tread support device and system | Sep 01, 14 | Apr 12, 16 | Not available |
| 9091083 | Adjustable staircase | Mar 10, 14 | Jul 28, 15 | OTTAWA HOSPITAL RESEARCH INSTITUTE |
| 8935894 | Concrete step | Sep 13, 13 | Jan 20, 15 | Not available |
| 8919055 | Pool liner retainer | Mar 15, 13 | Dec 30, 14 | P.I. INC. |
| 8857115 | Composite step tread | Oct 27, 11 | Oct 14, 14 | Trivector Manufacturing |
| 8821067 | Boat lift step | Jun 07, 13 | Sep 02, 14 | Not available |
| 7849643 | Structural step unit with run portion and rise portion | Dec 28, 04 | Dec 14, 10 | Intelligent Engineering (Bahamas) Limited |
| 6467234 | Stairway system | Dec 09, 99 | Oct 22, 02 | Not available |
| 5713166 | Monocoque staircase and method for joining wooden pieces | May 23, 94 | Feb 03, 98 | Structures Monocoques Inc. |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2024/0191,507 | STAIR SYSTEM | Dec 08, 23 | Jun 13, 24 | Not available |
| 2022/0259,865 | SYSTEM AND METHOD FOR AUTOMATING CONSTRUCTION AND INSTALLATION OF SURFACES IN CONSTRUCTION | May 04, 22 | Aug 18, 22 | Not available |
| 2022/0251,848 | ADJUSTABLE PET STAIR RAMP | Feb 11, 21 | Aug 11, 22 | Not available |
| 2019/0249,441 | STAIR TREAD PAN DESIGN WITH BOLT-IN PRE-CAST CONCRETE/OTHER MATERIAL TREAD CAPABILITY | Feb 14, 19 | Aug 15, 19 | Not available |
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