Key head

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Information

Patent Grant
D330501

References
Source

Patent Number
D330,501
Date Filed
Wednesday, November 27, 1991
33 years ago
Date Issued
Tuesday, October 27, 1992
32 years ago

Inventors
- Robert L. Steinbach
Original Assignees
- Chicago Lock Co.
Examiners
- Vinson; Brian N.
Agents
- Demeur; Basil E.
- Samlan; Alan B.

US Classifications
- D08 - Tools and hardware
Field of Search
- US
- D08 347-348
- 070 393
- 070 402-404
- 070 408
- Term of Grant
  14Years

Information

Abstract

Description

Claims

The ornamental design for the key head, having a key engaging end including an outer square shaped configuration and an inner circular configuration as shown and described.

US Referenced Citations (8)

Number	Name	Date	Kind
D244081	Steinbach	Apr 1977
D253160	Steinbach	Oct 1979
1984202	Shinn	Dec 1934
3251205	Kerr	May 1966
3267706	Kerr	Aug 1966
4619122	Simpson	Oct 1986
4838060	Hutzenlank	Jun 1989
4870842	Plumer	Oct 1989

Divisions (1)

	Number	Date	Country
Parent	440290	Nov 1989