Patent Application or Specification

• Author: Arti Kane
• Pages: 25-49

25

Patent Application

or Specification

What is a patent application or specification?

A patent specification is a document that describes the invention

for which a patent is sought and sets out the scope of the protection

of the patent. As such, a specification generally contains a section that

details the background and overview of the invention, a description

of the invention and embodiments of the invention and claims, which

set out the scope of the protection. A specification may include fig-

ures to aid the description of the invention, gene sequences and refer-

ences to biological deposits, or computer code, depending upon the

subject matter of the application. Most patent offices also require that

the application includes an abstract, which provides a summary of the

invention to aid searching. A title must also generally be provided for

the application.

USING U.S. PATENT 8,414,072 (COLLAPSIBLE

HANGING CHAIR) AS AN EXAMPLE, WRITE

A PATENT SPECIFICATION ON THE PEANUT

BUTTER AND JELLY SANDWICH.

In order to understand the anatomy of a patent application, we will

analyze a few patents by emphasizing their boilerplate language. I have

chosen the following patents because they are easy to understand and

are all related to each other.

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A CRASH COURSE ON U.S. PATENT LAW

26

United States Patent [PATENT NUMBER]

[INVENTOR] [ISSUE DATE]

[INSERT TITLE]

[THE BOILERPLATE LANGUAGE IS INDICATED IN BOLD. YOU CAN

USE THIS AS A TEMPLATE WHEN DRAFTING OTHER PATENT

APPLICATIONS.]

Description

FIELD OF THE INVENTION

[DESCRIBE THE GENERAL FIELD IN WHICH THE PRESENT INVEN-

TION IS LOCATED.]

The invention relates to equalization of high-speed digital communi-

cation channels using a threshold multiplexing feedback digital filter.

BACKGROUND

[DESCRIBE THE PRIOR ART AND EXPLAIN HOW THE PRESENT

INVENTION SOLVES THE PROBLEMS OF THE PRIOR ART.]

In high-speed digital communication systems, communication channels

often suffer from intersymbol interference (ISI). In such systems, coherent

detection and equalization are necessary to achieve satisfactory perfor-

mance. Equalizations are typically done using either linear digital filters

such as finite impulse response (FIR) filters or non-linear digital filters

such as decision feedback equalization (DFE) filters. Equalization can

also be done using analog filters before sampling occurs.

Theoretically, FIR filters can be used to approximate any time-invariant

impulse response with a large number of taps. The DFEs, which remove

both pre- and post-cursor ISI using a feed-forward FIR filter followed by a

feedb ack infinite im pulse resp onse (IIR) filter and a decision non-line arity,

are reported to have better equalization results. However, most digital

equalizers reported so far are very expensive to implement in very large

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