Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUSD289414 S
Publication typeGrant
Application numberUS 06/746,480
Publication dateApr 21, 1987
Filing dateJun 19, 1985
Publication number06746480, 746480, US D289414 S, US D289414S, US-S-D289414, USD289414 S, USD289414S
InventorsDavid C. Peters, Derek P. Williams, William C. Chadwick
Original AssigneeCarrier Corporation
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Duct design calculator
US D289414 S
Abstract  available in
Previous page
Next page
  1. The ornamental design for a duct design calculator, as shown.

FIG. 1 is an isometric view of a duct design calculator showing our new design;

FIG. 2 is a top plan view;

FIG. 3 is a right end elevational view; and

FIG. 4 is a bottom plan view.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6965848 *Dec 12, 2000Nov 15, 2005Dansk Industri Syndikat A/SDucting system designer
U.S. ClassificationD18/7