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International application No. Applicant's or agent's file reference
PCT/US2018/048981 438-73PCT
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
30 August 2018 07 September 2017
FOR FURTHER ACTION: See Form PCT/ISA/220 as well as, where applicable, item 5 below.
This international search report has been prepared by this International Searching Authority and is transmitted to the applicant according to Article 18. A copy is being transmitted to the International Bureau.
It is also accompanied by a copy of each prior art document cited in this report.
1. Basis of the report
a. With regard to the language, the international search was carried out on the basis of:
the international application in the language in which it was filed.
a translation of the international application into                                          which is the language of a translation furnished for the purposes of international search (Rules 12.3(a) and 23.1(b)).
This international search report has been established taking into account the rectification of an obvious mistake authorized by or notified to this Authority under Rule 91 (Rule 43.6bis(a)).
With regard to any nucleotide and/or amino acid sequence disclosed in the international application, the international search was carried out on the basis of a sequence listing:
2. Certain claims were found unsearchable
3. Unity of invention is lacking
4. Title of the invention
The text is approved as submitted by the applicant.
The text has been established by this Authority to read as follows:
5. Abstract
The text is approved as submitted by the applicant.
The text has been established, according to Rule 38.2, by this Authority as it appears in Box No. IV. The applicant may, within one month from the date of mailing of this international search report, submit comments to this Authority.
6. Drawings
The figure of the drawings to be published with the abstract is Figure No.     5    
as suggested by the applicant.
as selected by this Authority, because the applicant failed to suggest a figure.
as selected by this Authority, because this figure better characterizes the invention.
none of the figures is to be published with the abstract.


     G21G 4/00 (2006.01)i; G21H 5/00 (2006.01)i
According to International Patent Classification (IPC) or to both national classification and IPC


Minimum documentation searched (classification system followed by classification symbols):
Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched:
Korean utility models and applications for utility modelsJapanese utility models and applications for utility models
Electronic data base consulted during the international search (name of data base and, where practicable, search terms used):
eKOMPASS(KIPO internal) & keywords: radioactive, decay, stimulatory, transducer, frequency, support


Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
US 2002-0186805 A1 (SIDNEY SOLOWAY) 12 December 2002 See paragraphs 29, 49, and claims 1, 10.
US 2003-0203505 A1 (ROGER, O. WILLIAMS et al.) 30 October 2003 See paragraphs 22, 44, 55-56, 70, 84-85, claims 1, 3-4, and figures 1-2, 6.
WO 2006-128182 A2 (SPINDLETOP CORPORATION et al.) 30 November 2006 See pages 87, line 7 - page 89, line 19, and figures 24-26B.
US 5076971 A (WILLIAM A. BARKER) 31 December 1991 See column 4, line 22 - column 6, line 13, and claim 1.
JP 2002-519678 A (PAUL M. BROWN) 02 July 2002 See paragraphs 36-44, and figures 2-3.
Special categories of cited documents:
document defining the general state of the art which is not considered to be of particular relevance
earlier application or patent but published on or after the international filing date
document which may throw doubts on priority claim(s) or which is cited to establish the publication date of another citation or other special reason (as specified)
document referring to an oral disclosure, use, exhibition or other means
document published prior to the international filing date but later than the priority date claimed
later document published after the international filing date or priority date and not in conflict with the application but cited to understand the principle or theory underlying the invention
document of particular relevance; the claimed invention cannot be considered novel or cannot be considered to involve an inventive step when the document is taken alone
document of particular relevance; the claimed invention cannot be considered to involve an inventive step when the document is combined with one or more other such documents, such combination being obvious to a person skilled in the art
document member of the same patent family


Patent document cited in search report Publication date
Patent family member(s) Publication date
US 2002-0186805 A1
12 December 2002
DE 69627361 T2
EP 0856206 A1
EP 0856206 A4
EP 0856206 B1
JP 2001-525920 A
US 2006-0210008 A1
WO 97-15104 A1
16 October 2003
17 October 2001
28 April 1999
09 April 2003
11 December 2001
21 September 2006
24 April 1997
US 2003-0203505 A1
30 October 2003
AU 2002-29082 A
CA 2430422 A1
EP 1349661 A2
US 2002-0094582 A1
US 2003-0133842 A1
US 2003-0186459 A1
US 2003-0186460 A1
US 2003-0203386 A1
US 2003-0211632 A1
US 2004-0009611 A1
US 2008-0092968 A1
US 2008-0103054 A1
US 2008-0103062 A1
US 2012-0115756 A1
US 6596239 B2
US 8137640 B2
WO 02-047820 A3
WO 02-047820 A8
WO 02-47820 A2
24 June 2002
20 June 2002
08 October 2003
18 July 2002
17 July 2003
02 October 2003
02 October 2003
30 October 2003
13 November 2003
15 January 2004
24 April 2008
01 May 2008
01 May 2008
10 May 2012
22 July 2003
20 March 2012
08 May 2003
18 September 2003
20 June 2002
WO 2006-128182 A2
30 November 2006
AU 2003-301933 A1
CA 2486458 A1
EP 1576616 A2
JP 2006-515669 A
US 2007-0286324 A1
WO 2004-044923 A2
WO 2006-128182 A3
03 June 2004
27 May 2004
21 September 2005
01 June 2006
13 December 2007
27 May 2004
19 April 2007
US 5076971 A
31 December 1991
EP 0313073 A2
EP 0313073 A3
JP 01-199200 A
US 4961880 A
26 April 1989
18 April 1990
10 August 1989
09 October 1990
JP 2002-519678 A
02 July 2002
AU 1999-47141 A1
CA 2335759 A1
CN 1316088 A
EA 200100079 A1
EP 1090395 A1
GE P20032964 B
US 2002-0169351 A1
WO 00-00986 A1
WO 00-00986 A9
17 January 2000
06 January 2000
03 October 2001
22 October 2001
11 April 2001
10 October 2002
14 November 2002
06 January 2000
23 March 2000
Name and mailing address of the ISA/:
Korean Intellectual Property Office
189 Cheongsa-ro, Seo-gu, Daejeon Metropolitan City, 302-701
Republic of Korea
Facsimile No. +82-42-481-8578
Date of the actual completion of the international search:
20 March 2019
Date of mailing of the international search report:
20 March 2019
Authorized officer:
PARK, Hye Lyun
Telephone No. +82-42-481-3463
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