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Index to Patent Classification

The first step will be to look at The Index to U.S. Patent Classification. This is the alphabetical subject index to the Manual of Classification. The Index is also available on the Assist Disc of the Cassis CD-Rom, we find that using the Index in its paper format is easier.

We need to think of common terms describing our invention, its function, effect, end-product, structure, and use. We will look up the word "apron".

When we first think of the word "apron", most of us think of the garment protector, however we notice under the heading Apron, that there are many types of aprons listed. This is one of the reasons we do not search by key words, because while searching for the garment patents, we would have to weed through patents for the vending machine aprons, the dump car aprons, and the vehicle fender aprons.

There are three types of patents. The most common type of patent is a utility patent. This is one in which the invention works in a new way to perform a useful function. Patent searchers are frequently confused when they see Classifications or Patents that begin with "D". These cover design patents. A design patent is one in which the invention is purely visual, it is based solely on the look of the item. The third type is for plant patents. These offer patent protection for plants that have been asexually reproduced.

Our apron would be a utility patent, because our idea has a utilitarian function, so we don't look at the headings under apron that say "design".

We will need to conduct our search a little differently if we think our patent may be a design patent.

We want to look at patents for an apron that is apparel, therefore we will be looking at Class 2 and Subclass 48. The plus sign (+) next to the 48 indicates that when we get to the next step, looking at the Manual of Classification, we will want to look around at the subclasses located near Subclass 48, in Class 2, for other, closely related, classifications. We will note the class and subclass numbers, 2/48, before continuing to the next step, looking at the Manual of Classification.

The Index to U.S. Patent Classification is available online on the SunSite from the University of North Carolina at Chapel Hill.

Sometimes using the Find command, under the Edit pull down menu can be helpful in searching for one word in a large body of material.

We find that most people prefer using the Index in paper form, if it is available to them, because it is easier to browse this way.

We will note the class and subclass numbers, 2/48, before continuing to the next step, looking at the Manual of Classification.


Created by Nancy Green. Please send comments to englib@lib.utexas.edu
©1996 by the University of Texas at Austin. This material may be quoted or reproduced without prior permission, provided appropriate credit is given.

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