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Dialog "How Do I...?" - Patents

Find Prior Art Using International Classification Codes?

TOPIC: In this example, you will identify International Classification codes for a specific category of patents. Patents are legal documents. Codes, which are added to the patents by Patent Examiners and Information Providers, can help researchers with their searches. The U.S. Patent Office, the database producer of the CLAIMS databases and WIPO (World International Patent Organization) have each developed a set of codes.

To find codes, search on synonyms and RANK IC, the International Class code. Then save the top few codes to search. The RANK command extracts terms from the specified field(s) in a set of records and lists them in ranked order. The most highly posted term will appear first.

Use Derwent World Patents Index® (File 351) to obtain descriptive titles of the technology.

 

COMMAND SUMMARY

BEGIN 351
SELECT SURG? ? OR SURGING? OR OVERCURRENT? OR OVERVOLT? OR OVER()(CURRENT? OR VOLT?)
SELECT PROTECT? OR SUPPRES? OR ARREST?
SELECT S1 (1N) S2
SELECT TELEPHON? OR TELECOM?
SELECT S3 (50N) S4
RANK IC
SELECT S5 or S6
TYPE S7/TI/1-2


HOW TO...



1. Conduct a subject search to retrieve patents in your area of technology using Derwent World Patents Index (File 351).

 

2. Use keywords to obtain all synonyms. Note limited truncation ? ? to take the place of one letter.


?B 351     
SYSTEM:OS  - DIALOG OneSearch
  File 351:Derwent WPI 1963-2006/UD,UM &UP=200633
         (c) 2006  Thomson Derwent
      Set  Items  Description
      ---  -----  -----------
?SELECT SURG? ? OR SURGING? OR OVERCURRENT? OR OVERVOLT? OR 
 OVER()(CURRENT? OR VOLT?)
           15470  SURG? ?
             933  SURGING?
            9260  OVERCURRENT?
            8087  OVERVOLT?
          925321  OVER
          658879  CURRENT?
          607081  VOLT?
            6450  OVER(W)(CURRENT? OR VOLT?)
      S1   37057  SURG? ? OR SURGING? OR OVERCURRENT? OR
                  OVERVOLT? OR OVER()(CURRENT? OR VOLT?) 
?SELECT PROTECT? OR SUPPRES? OR ARREST?
          618652  PROTECT?
          215697  SUPPRES?
           22824  ARREST?
      S2  843416  PROTECT? OR SUPPRES? OR ARREST?


3. Use proximity connectors (1N) and (50N) to combine sets.

 

 


?SELECT S1 (1N) S2
           37057  S1
          843416  S2
      S3   10868  S1 (1N) S2 
?SELECT TELEPHON? OR TELECOM?
          276155  TELEPHON?
           52979  TELECOM?
      S4  316575  TELEPHON? OR TELECOM? 
?SELECT S3 (50N) S4
           10868  S3
          316575  S4
      S5     590  S3 (50N) S4      

4. RANK IC to obtain a list of International Class codes.


 

 

 

 

 

A list of class codes with the class code contained the most in the records in S5 displays first.

 

 

 

 

 

 

 

 

Type the Rank No. of the class code(s) you want to select (1).

 

 

 

 

 

 

 

 

 

 

 

 

 

EXIT the Rank menu to continue searching.

 

 

Type Yes (Y) to indicate that you have saved RANKed items.


?RANK IC
Started processing RANK
Processing    100 of    590 records
Processing    200 of    590 records
Completed Ranking 590 records 
DIALOG RANK Results
--------------------
RANK: S5/1-590   Field: IC=  File(s): 351
(Rank fields found in 589 records -- 480 unique terms) 
Page 1 of 60 
RANK No.  Items  Term
--------  -----  ----
    1      126   H02H-009/04
    2       64   H02H-003/22
    3       64   H02H-009/06
    4       47   H04M-003/18
    5       45   H04M-001/00
    6       39   H02H-003/20
    7       37   H01C-007/12
    8       37   H02H-001/00
P =  next page      Pn = Jump to page n
P- = previous page  M =  More Options  Exit = Leave RANK
To view records from RANK, enter VIEW followed by RANK 
number, format, and item(s) to display, e.g., VIEW 2/9/ALL.
Enter desired option(s) or enter RANK number(s)to save terms. 
?1

RANK numbers saved: 1
DIALOG RANK Results
--------------------
RANK: S5/1-590   Field: IC=  File(s): 351
(Rank fields found in 589 records -- 480 unique terms)
Page 1 of 60

RANK No.  Items  Term
--------  -----  ----
    1      126   H02H-009/04
    2       64   H02H-003/22
    3       64   H02H-009/06
    4       47   H04M-003/18
    5       45   H04M-001/00
    6       39   H02H-003/20
    7       37   H01C-007/12
    8       37   H02H-001/00
P =  next page      Pn = Jump to page n
P- = previous page  M =  More Options  Exit = Leave RANK
To view records from RANK, enter VIEW followed by RANK 
number, format, and item(s) to display, e.g., VIEW 2/9/ALL. 
Enter desired option(s) or enter RANK number(s) to 
save terms.
?EXIT
RANK results will be erased; have you saved all the 
terms of interest? (YES/NO) 
?Y
Temp SearchSave "TD335" stored
Creating temporary SearchSave ... TD335

5. Execute the SearchSave (EXS).

6. Use the OR connector to combine the class code set with the keyword set to retrieve all records on this topic.

 

Enter EXS to execute the SearchSave
?EXS
Executing TD335
      S6    3205  IC="H02H-009/04" 
?SELECT S5 OR S6
             590  S5
            3205  S6
      S7    3669  S5 OR S6
7. TYPE S7 using the user-defined format TI to see the Derwent descriptive titles of the patents.
?TYPE S7/TI/1-2
  7/TI/1     (Item 1 from file: 351)  
DIALOG(R)File 351:(c) 2006  Thomson Derwent. 
All rts. reserv. 
Over voltage warning device for power socket, has 
warning unit to output optical and acoustic warning 
signals simultaneously or separately if  
output load of main body is larger than maximum
nominal load  
  7/TI/2     (Item 2 from file: 351)  
DIALOG(R)File 351:(c) 2006  Thomson Derwent. 
All rts. reserv. 
Controller for dimmer switch in DC lighting system, 
has pulse width modulation circuit which applies 
predetermined process to drive voltage to provide
modified output whose maximum effective voltage is 
capped  

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Stock #: 54135;       Last modified: 22 Oct 2011


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