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ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

Classification 381/all - subclasses >> view this class definition


U. S. PATENT RESOURCES

As general guidance, a complete search of U. S. patents in this art area will include the following:

  1. A classified search of the original classification class and subclass for the subject matter and the other highly relevant art areas in the US patent documents
  2. A text search of the US patent documents; patents, PG PUB, and OCR databases:
    • Broad text search for the general inventive concept(s), not limited by classification
    • Narrow text search for the specific claimed invention
    • Boolean text search employing the relevant inventive terms

The resources listed below are internal USPTO search tools. However, the information that they cover is available either commercially, on the USPTO web site, or in the Public Search Facility on the USPTO Headquarters campus and the Patent and Trademark Depository Libraries.

EAST/WEST
EAST Coverage: 1971 - present, Full Text: 1971 - present
WEST Coverage: 1971 - present, Full Text: 1971 - present
Full text patent and inventor searching.

All patent documents in a classification are viewed by USPC for relevance to the patent application being searched. Classification searching is used when the spatial relationships or shapes of the transducer elements constitute important aspects of the claimed invention. The drawings are useful for teaching structural configurations as well as sound directivity and frequency response graphs. For plastic material, text searching is essential since it is not shown in the drawings. Inventor searches are also needed for the non-transducer (non-housing) portion of the USPC schedule (class 381 subclasses 1-23.1, 26-28, 56-67, 70-86, 88-89, 91-124, 300-321, 332-336).
BRS Search/USOCR Database
EAST Coverage: 1920 - 1970, Full Text: 1920 - 1970
WEST Coverage: 1920 - 1970, Full Text: 1920 - 1970
Full text of U.S. patent grants.

All patent documents in a classification are viewed by USPC for relevance to the patent application being searched. Classification searching is used when the spatial relationships or shapes of the transducer elements constitute important aspects of the claimed invention. The drawings are useful for teaching structural configurations as well as sound directivity and frequency response graphs. For plastic material, text searching is essential since it is not shown in the drawings. Inventor searches are also needed for the non-transducer (non-housing) portion of the USPC schedule (class 381 subclasses 1-23.1, 26-28, 56-67, 70-86, 88-89, 91-124, 300-321, 332-336).
PGPUBS
EAST Coverage: 2001 - present, Full Text: 2001 - present
WEST Coverage: 2001 - present, Full Text: 2001 - present
U.S. published applications.

All patent documents in a classification are viewed by USPC for relevance to the patent application being searched. Classification searching is used when the spatial relationships or shapes of the transducer elements constitute important aspects of the claimed invention. The drawings are useful for teaching structural configurations as well as sound directivity and frequency response graphs. For plastic material, text searching is essential since it is not shown in the drawings. Inventor searches are also needed for the non-transducer (non-housing) portion of the USPC schedule (class 381 subclasses 1-23.1, 26-28, 56-67, 70-86, 88-89, 91-124, 300-321, 332-336).

FOREIGN PATENT RESOURCES

Searched separately from the U.S. Patent Search. These databases consist of abstract documents. Text searching abstracts requires the use of different search logic e.g. the use of broad Boolean and/or operators instead of narrow proximity operators.

Derwent World Patents Index and the contents of the EPO Abstracts and JPO Abstracts are available commercially.

Derwent World Patents Index, Classification and Text Search
EAST Coverage: 1963 - present, Full Text: - N/A
WEST Coverage: 1963 - present, Full Text: - N/A
English abstracts database of patent documents from more than 40 patent-issuing authorities.

Used for full text and inventor searching. Queries may include classification parameters when combined with other terms to be searched in the technical content of the application.
EPO Abstracts, Text and Classification Search
EAST Coverage: 1978 - present, Full Text: - N/A
WEST Coverage: 1978 - present, Full Text: - N/A
English abstracts database of patents and published applications from EPO, WO/PCT, United Kingdom, France, Germany, and Switzerland. USPC searching is limited to documents added to the database from 1978 to September 30, 1995.

EPO patent documents in a USPC or an IPC classification are viewed for relevance to the patent application being searched. Includes a classified search in EAST or WEST.
JPO Abstracts, Text and Classification Search
EAST Coverage: 1976 - present, Full Text: - N/A
WEST Coverage: 1976 - present, Full Text: - N/A
English abstracts database of Japanese published unexamined applications. USPC searching is limited to documents added to the database from 1978 to September 30, 1995.

JPO patent documents in a USPC or an IPC classification are viewed for relevance to the patent application being searched. Includes a classified search in EAST or WEST. Used for full text and inventor searching.
JPO Industrial Property Digital Library
NCIPI Coverage: 1976 - present, Full Text: 1976 - present
Japanese patent information.

This resource is used as a source for machine translations of Japanese patent documents from 1993 to present.

NON-PATENT LITERATURE RESOURCES

The resources listed are those that USPTO staff have found consistently yield the most relevant search results. Commercial databases available through a single vendor can generally be searched simultaneously, although it is preferable to search full text and bibliographic databases in separate groupings. In addition to the use of subscription databases and public Internet sites, it is recommended that books, manuals, standards and specifications be considered in the search for prior art.

ACM Digital Library
ACM Coverage: Dates - vary, Full Text: Dates - vary
Citations and full text articles from ACM journals, newsletters, and conference proceedings.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound, virtual positioning, public address systems, electro-acoustic audio transducers.
IEEE Xplore
IEEE Coverage: 1952 - present, Full Text: 1988 - present
Full text access to technical literature in electrical engineering, computer science, and electronics.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound, virtual positioning, public address systems, electro-acoustic audio transducers.
ABI/INFORM
Dialog Coverage: 1971 - present, Full Text: 1991 - present
STN Coverage: 1971 - present, Full Text: 1991 - present
Covers worldwide business and management issues.

This resource provides relevant data for audio, stereos, sound effects, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound. This resource also contains product data.
Business & IndustryTM (B&I)
Dialog Coverage: 1994 - present, Full Text: 1994 - present
Facts, figures, and key events dealing with public and private companies, industries, markets products for all manufacturing and service industries at an international level.

This resource provides relevant data for audio, stereos, sound effects, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound.
Business Dateline
Dialog Coverage: 1985 - present, Full Text: 1985 - present
Full text of major news and feature stories from regional business publications from throughout the United States and Canada.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound.
Business Wire
Dialog Coverage: 1999 - present, Full Text: 1999 - present
Full text of news releases issued by approximately 10,000 corporations, universities, research institutes, hospitals, and other organizations.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound.
CMP Computer Fulltext
Dialog Coverage: 1988 - present, Full Text: 1988 - present
Full text information about the computer, communications, and electronic industries.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound, electro-acoustic audio transducers.
Computer News Fulltext
Dialog Coverage: 1989 - present, Full Text: 1989 - present
Full text articles from Computerworld and Network World.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound.
DIALOG Telecommunications Newsletters
Dialog Coverage: 1995 - present, Full Text: 1995 - present
Full text telecommunications newsletters that provide information on companies, products, markets, and technologies.

This resource provides relevant data for audio, stereo speakers, stereo systems, surround sound, earphones, headphones, loudspeakers, satellite radio. This resource also contains product data.
Ei Compendex
Dialog Coverage: 1970 - present, Full Text: - N/A
Questel Orbit Coverage: 1970 - present, Full Text: - N/A
STN Coverage: 1970 - present, Full Text: - N/A
Comprehensive database of engineering literature.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound, electro-acoustic audio transducers.
EMBASE
Dialog Coverage: 1993 - present, Full Text: - N/A
STN Coverage: 1974 - present, Full Text: - N/A
Index of the world's literature on human medicine and related disciplines.

This resource provides relevant data for stethoscopes, hearing aids.
Gale Group Computer DatabaseTM
Dialog Coverage: 1983 - present, Full Text: 1988 - present
Information about the computer, electronics, and telecommunications industries.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound, virtual positioning, electro-acoustic audio transducers.
Gale Group GlobalbaseTM
Dialog Coverage: 1986 - 2002, Full Text: - N/A
Worldwide coverage of companies, products, and industries with a primary focus on Europe.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound.
Gale Group Magazine DatabaseTM
Dialog Coverage: 1959 - present, Full Text: 1983 - present
Current and retrospective news from more than 400 popular magazines on such subjects as consumer behavior, media trends, popular culture, political opinion, leisure activities, and contemporary lifestyles.

This resource provides relevant data for audio, stereo speakers, stereo systems, surround sound, earphones, headphones, loudspeakers, hearing aids. This resource also contains product data.
Gale Group New Product Announcements/Plus (NPA/Plus)
Dialog Coverage: 1985 - present, Full Text: 1985 - present
Full text press releases from all industries covering announcements related to products, with a focus on new products and services.

This resource provides relevant data for audio, stereo speakers, stereo systems, surround sound, earphones, headphones, loudspeakers, hearing aids. This resource also contains product data.
Gale Group Newsletter DatabaseTM
Dialog Coverage: 1988 - present, Full Text: 1988 - present
Full text of specialized industry newsletters that provide information on companies, products, markets, and technologies.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, stereo speakers, stereo systems, surround sound, hearing aids.
Health Devices AlertsŪ (HDA)
Dialog Coverage: 1977 - present, Full Text: - N/A
Database of reported medical device problems, hazards, recalls, evaluations, and updates.

This resource provides relevant data for stethoscopes, hearing aids.
IBM Technical Disclosure Bulletin
EAST/WEST Coverage: 1958 - 1998, Full Text: -
Defensive disclosure database.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, earphones, microphones, surround sound, electro-acoustic audio transducers.
Inside Conferences
Dialog Coverage: 1993 - present, Full Text: - N/A
Contains details of all papers given at every congress, symposium, conference, exposition, workshop, and meeting received at the British Library Document Supply Centre.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound.
Inspec (The Database for Physics, Electronics and Computing)
Dialog Coverage: 1898 - present, Full Text: - N/A
Dialog DataStar Coverage: 1898 - present, Full Text: - N/A
Questel Orbit Coverage: 1969 - present, Full Text: - N/A
STN Coverage: 1969 - present, Full Text: - N/A
Inspec (The Database for Physics, Electronics and Computing) corresponds to the three Science Abstracts print publications: Physics Abstracts, Electrical and Electronics Abstracts, and Computer and Control Abstracts.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound, public address systems, electro-acoustic audio transducers. This resource also includes abstracts for IEEE and IEE publications.
JICST-EPlus - Japanese Science & Technology
Dialog Coverage: 1985 - present, Full Text: - N/A
STN Coverage: 1985 - present, Full Text: - N/A
English citations and abstracts covering the literature published in Japan on all fields of science, technology, and medicine.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound, virtual positioning, public address systems, electro-acoustic audio transducers.
MEDLINE (Medical Literature, Analysis, and Retrieval System Online)
Dialog Coverage: 1951 - present, Full Text: - N/A
STN Coverage: 1950 - present, Full Text: - N/A
Bibliographic database containing references to journal articles in life sciences with a concentration on biomedicine.

This resource provides relevant data for stethoscopes, hearing aids.
PASCAL
Dialog Coverage: 1973 - present, Full Text: - N/A
Questel Orbit Coverage: 1967 - present, Full Text: - N/A
STN Coverage: 1977 - present, Full Text: - N/A
Multidisplinary, multilingual bibliographic database covering the major international literature in science, technology, and medicine.

This resource provides relevant data for audio, stereos, sound effects, acoustical noise or sound cancellation, vehicle stereos or speakers or audio, headphones, earphones, microphones, stereo speaker arrangement, surround sound, electro-acoustic audio transducers.
Periodical Abstracts PlusText
Dialog Coverage: 1986 - present, Full Text: 1992 - present
Abstracts or full-text journal articles on science, technology, business, finance, and computers.

This resource provides relevant data for audio, stereo speakers, stereo systems, surround sound, hearing aids, earphones and headphones.
ProQuest Direct
ProQuest Coverage: Dates - vary, Full Text: 1986 - present
Current periodicals and newspapers, as well as archives of major newspapers.

This resource provides relevant data for audio, stereo speakers, stereo systems, surround sound, earphones, headphones, loudspeakers, hearing aids. This resource also contains product data.
Readers Guide Abstracts Full Text
Dialog Coverage: 1983 - present, Full Text: 1994 - present
Contains feature articles, news stories, cover stories, product evaluations, performing arts reviews, book reviews, fiction, short stories, and poems.

This resource provides relevant data for audio, loudspeakers, stereo speakers, hearing aids, stethoscopes.

INTERNET SEARCH TOOLS

An Internet search should be considered when a search of the resources listed above fails to locate relevant prior art. A preliminary Internet search may be performed to obtain an overview of the technology, and to identify additional search terms and related product information.

Google TM
Google Coverage: - N/A, Full Text: - N/A
Internet search engine.

Used for broad text searching and for obtaining automobile manuals.


Public Comments on the Search Templates

Public comments on the search templates are invited. Comments should address the points enumerated in the Criteria for Evaluating Recommended Search Resources. Comments can be submitted via the Search Template Project e-mail link on each template page or by mail addressed to:

Mail Stop Patents Search Template Comments
Commissioner for Patents
P.O. Box 1450
Alexandria, VA 22313-1450
Electronic submission is preferred. The Office will respond to comments in writing.

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