Interlocking toy blocks
Abstract
Abstract EACH BLOCK OF THE MUTUALLY COUPABLE ASSEMBLING TOY HAS A PLATE THE PERIPHERY OF WHICH IS DEFINED BY TWO CIRCLES AND TWO OPPOSING LINES PARALLEL TO A STRAIGHT LINE JOINING THE CENTERS OF THE CIRCLES, THE DISTANCE BETWEEN THE TWO LINES BEING SMALLER THAN THE DIAMETER OF THE CIRCLES. THE UPPER SURFACE OF THE PLATE IS PROVIDED WITH A PLUARLITY OF CYLINDRICAL PROJECTIONS EQUALLY SPACED APART TO ONE ANOTHER AND IN TWO ROWS IN PARALLEL. THE LOWER SURFACE OF THE PLATE ARE PROVIDED WITH TWO CYLINDRICAL WALLS POSITIONED IN ALIGNMENT WITH THE RESPECTIVE CIRCLES AND TWO OPPOSING WALLS POSITIONED IN ALIGNMENT WITH THE RESPECTIVE LINES AND ENDING TO THE CYLINDRICAL WALLS. PREFERABLY, ALL OF THE PLATE, PROJECTIONS, CYLINDRICAL WALLS AND PARALLEL WALLS ARE MOULDED WITH SYNTHETIC RESIN IN AN INTEGRAL FORM.
Inventors
- 👤 Takashi Matsubayashi
- 👤 Hirozo Matsubayashi
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |