Patents
US 7552608 B2: Lock, key blank, and key of a hierarchical lock system
- Granted
- 2009-06-30
- Filed
- 2008-06-18 application 12141427
- Type
- Utility · 16 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A lock system includes keys, key blanks, keyways, and lock cylinders, and the keys or key blanks have opposite sides formed with grooves for cooperating with a conforming keyway. More particularly, the sides of the key or key blank have a portion grooved for registration, another portion grooved for top-level hierarchical master keying, and two other portions, one on each side of the blade, for further master key variations and different combinations. One of the two further sections being curvilinear and the other rectangular or angular cuts. The conforming keyway of the lock includes ridges and grooves corresponding to the grooves and ridges, respectively, of the key or key blank. Instruments other than keys or key blanks may be used to enter the grooves and ridges of the keyway to operate the lock without the use of a precisely configured key.
Source: PVGPATDIS, file of 2026-04-10 (ipg090630.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| MEDECO SECURITY LOCKS, INC. 10 patents | US company or organization | Salem, VA | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Peter H. Field | Salem, VA | 17 | PVGPATDIS, file of 2026-04-10 | |
| Steve Poff | Roanoke, VA | 3 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| E05B | Locks; accessories therefor; handcuffs | E05B19/0029 | PVGPATDIS, file of 2026-04-10 |
| Y10T | Technical subjects covered by former us classification | Y10T70/7463 | 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 |
|---|---|---|---|---|---|
| 2016-06-09 | Name change Change of name | MEDECO SECURITY LOCKS, INCORPORATED signed 2015-12-31 | ASSA ABLOY HIGH SECURITY GROUP INC. SALEM, VA | 38934/595 | ECORSEXC, file of 2026-09-25 |
| 2008-06-18 | Assignment Assignment of assignor's interest | FIELD, PETER H. signed 2008-06-09 POFF, STEVE signed 2008-06-10 | MEDECO SECURITY LOCKS, INC. SALEM, VA | 21114/68 | 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.