Patents
US 9358823 B2: Braille erasure mechanism
- Granted
- 2016-06-07
- Filed
- 2013-11-07 application 14074236
- Type
- Utility · 13 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An improved Braille erasure mechanism may comprise a reverse-embosser or impressing mechanism to imprint a negative Braille cell. A negative Braille cell is the reverse of a normal Braille cell, with one or more dots lowered or pressed into the printing medium in an opposite direction to the raised dots of a normal Braille cell. Because the dots of a negative Braille cell are lowered past the surface of the printing medium, they may be ordinarily undetectable to the fingers of a Braille user. Accordingly, by imprinting a full negative Braille cell on top of a Braille cell to be erased, all of the previously raised dots of the Braille cell may be lowered beyond the surface of the printing medium. Any further Braille cell embossed over the erased cell will be free from corruption, because any dot not used by the new cell will remain lowered and undetectable.
Source: PVGPATDIS, file of 2026-04-10 (ipg160607.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Perkins School for the Blind 8 patents | US company or organization | Watertown, MA | PERKINS SCHOOL FOR THE BLIND Federal lobbying client EXACT high confidence: identical full name and state PERKINS SCHOOL FOR THE BLIND Nonprofit EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Michael Schmidt | Shelby Charter Township, MI | 59 | PVGPATDIS, file of 2026-04-10 | |
| Jude Royston Jonas | Waltham, MA | 34 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| B41M | Printing, duplicating, marking, or copying processes; colour printing, | B41M3/16 | PVGPATDIS, file of 2026-04-10 |
| G09B | Educational or demonstration appliances; appliances for teaching, or communicating with, the blind, deaf or mute; models; planetaria; globes; maps; diagrams | G09B21/02 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2016-05-05 | Assignment Assignment of assignor's interest | JONAS, JUDE signed 2011-07-07 SCHMIDT, MICHAEL signed 2011-07-07 | PERKINS SCHOOL FOR THE BLIND WATERTOWN, MA | 38475/847 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.