Magnetic sheet holders,open-ended slides and an information present-retrieve communications system employing the same
Abstract
Abstract AN INTEGRATED SYSTEM FOR PRESENTING AND RETRIEVING MOVEABLE PICTURES OR IRONS. A TRANSPARENT SUSPENSION FILE FOLDER HAS MAGNETS ATTACHED THERETO FOR INSTANT DISPLAY OF MATERIAL ON A IRON PLATE DISPLAY BOARD. THE IRON SURFACE OF THE DISPLAY BOARD IS COVERED WITH A WASHABLE PLASTIC MATERIAL SO THAT IT CAN BE WRITTEN ON WITH WASHABLE INK. THE MAGNETS ARE SO PLACED ON THE FILE FOLDER THAT THEY COOPERATE IN TEMPORARILY AFFIXING THE SAME AGAINST THE IRON BED OF AN OPAQUE, OR THE IRON FRAME OF A TRANSPARENCY, PROJECTOR. MAGNETIC INSTANT DISPLAY TRANSPARENT ART FOLDERS ARE ALSO DISCLOSED. ONE FORM OF MAGNET DISCLOSED IS A U-SHAPED MAGNETIC SPINE WHICH IS EASILY ATTACHABLE AND DETACHABLE FROM THE TRANSPARENT FILE FOLDERS OF THE INVENTION. ANOTHER TAKES THE FORM OF ONE OR TWO, PREFERABLY FLEXIBLE, MAGNETIC STRIPS ADHERED TO ONE SIDE OF A TRANSPARENT FILE FOLDER ALONG ONE OR BOTH THE LONG EDGES THEREOF.
Inventors
- 👤 Paul Gilmore Williams Jr
Bibliographic Details
Claims Analysis
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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 |