Air stone
Willinger October 10, 1
U.S. patent number D249,897 [Application Number 05/816,071] was granted by the patent office on 1978-10-10 for air stone. This patent grant is currently assigned to Willinger Bros., Inc.. Invention is credited to Allan H. Willinger.
| United States Patent | D249,897 |
| Willinger | October 10, 1978 |
Air stone
Claims
The ornamental design for an air stone, substantially as shown.
| Inventors: | Willinger; Allan H. (New York, NY) |
|---|---|
| Assignee: | Willinger Bros., Inc. (New
York, NY) |
| Appl. No.: | 05/816,071 |
| Filed: | July 15, 1977 |
| Current U.S. Class: | D30/106 |
| Current International Class: | D3099 |
| Field of Search: | ;D30/6-99 ;119/5 |
References Cited [Referenced By]
U.S. Patent Documents
| 3507253 | April 1970 | Willinger |
| 3524430 | August 1970 | Willinger |
| 3575350 | April 1971 | Willinger |
Attorney, Agent or Firm: Friedman; Abraham
Description
FIG. 1 is a perspective view of an air stone, showing my new design;
FIG. 2 is a top plan view;
FIG. 3 is a rear elevational view;
FIG. 4 is a right side elevational view; and
FIG. 5 is a bottom plan view.
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