| 0351799 | November, 1886 | Ruelius | 238/10E | |
| D355452 | Combined toy I-beam and blocks | February, 1995 | Glynn | D21/108 |
| D355453 | Combined toy girder beam and block | February, 1995 | Glynn | D21/108 |
| D355454 | Combined toy girder beam and blocks | February, 1995 | Glynn | D21/108 |
| D355681 | Combined toy orificed beam and block | February, 1995 | Glynn | D21/108 |
| D356124 | Combined toy I-beam and block | March, 1995 | Glynn | D21/108 |
| D367898 | Toy construction block with T-slot | March, 1996 | Glynn | D21/108 |
| D377377 | Toy construction block with symmetrically arranged T-slots | January, 1997 | Glynn | D21/108 |
| 1281856 | October, 1918 | Shaw | ||
| 1838509 | Adapter | December, 1931 | Westcott | 238/10E |
| 1971545 | Toy building block | August, 1934 | Tompkins | 446/121 |
| 2020562 | Toy block | November, 1935 | Miller | 46/35 |
| 2031194 | Building block | February, 1936 | Thompson | 446/108 |
| 2077065 | Building lumber | April, 1937 | Johannes | 46/25 |
| 2861388 | Structural toy and model building set | November, 1958 | Favaretto | 446/124 |
| 3127175 | March, 1964 | White | 273/132 | |
| 3234683 | Toy building element including a rotatable bushing | February, 1966 | Christiansen | 46/25 |
| 3242610 | Flexible connector for toy construction sets | March, 1966 | Christiansen | 46/26 |
| 3415007 | Toy building set | December, 1968 | Howe | 46/19 |
| 3545122 | CUBE AND PARALLELEPIPED HALF BLOCKS FORMING MODULAR ELEMENTS CONNECTABLE IN VARIOUS WAYS | December, 1970 | Onanian | 46/25 |
| 3597875 | TOY BUILDING SET | August, 1971 | Christiansen | 46/25 |
| 3640017 | SLIDE-BAR ASSEMBLY HAVING COMPLEMENTARY SLIDABLE MEMBERS | February, 1972 | Christiansen | 46/23 |
| 3667153 | INTERLOCKING ARRANGEMENTS | June, 1972 | Christiansen | 46/30 |
| 3690031 | TOY CONSTRUCTION BLOCK SET | September, 1972 | Shinoda | 46/17 |
| 3791090 | BUILDING BLOCK | February, 1974 | Knifel | 52/593 |
| 3803754 | BLOCKS WITH NON-CIRCULAR SLITS AND FLAT CONNECTORS HAVING TRANSVERSELY BOWED MIDDLE PORTIONS | April, 1974 | Fischer | 46/26 |
| 4044497 | Kit with male and female elements having deformable gripping means | August, 1977 | Bettens | 46/17 |
| 4182072 | Toy construction kit | January, 1980 | Much | 46/17 |
| 4185410 | Slideable suspension device | January, 1980 | Kristiansen | 46/23 |
| 4253268 | Playtoy building block set | March, 1981 | Mayr | 46/30 |
| 4403733 | Track assembly for toy trains | September, 1983 | Bach et al. | 238/10 |
| 4726515 | Track system for toy vehicles | February, 1988 | Bolli et al. | 238/10 |
| 5049104 | Connecting means for a toy building set | September, 1991 | Olsen | 446/104 |
| 5061218 | Toy building blocks | October, 1991 | Garage et al. | 446/102 |
| 5094643 | Connecting device for toy construction elements | March, 1992 | Bolli et al. | 446/121 |
| 5209693 | Toy block set with diverse flexible connectors on opposing ends | May, 1993 | Lyman | 446/104 |
| 5411428 | Block units for a block toy | May, 1995 | Orii et al. | 446/90 |
| 5427558 | Toy building element with a spring mechanism | June, 1995 | Knudsen | 446/102 |
| 5527201 | Toy construction kit with interconnecting building pieces | June, 1996 | Maddock | 446/104 |
| 5823843 | Spherical element combination for construction toy set | October, 1998 | Pohlman | 446/108 |
FIG. 1 is a perspective view of a toy-block with angled tapered rail extension showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a first side elevational view thereof;
FIG. 4 is a second side elevational view thereof;
FIG. 5 is a third side elvevational view thereof;
FIG. 6 is a fourth side elevational view thereof; and,
FIG. 7 is a bottom plan view thereof.