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International application No. Applicant's or agent's file reference
PCT/US2019/063382 P238WO1506
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
26 November 2019 06 December 2018
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 filed or furnished:
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.     4    
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.


     G06F 11/10 (2006.01)i; G11C 29/52 (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 models
Japanese 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: memory, test, multi-level signaling, symbol, modulation scheme, translate, detect, error


Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
US 2007-0245214 A1 (ADITYA RAMAMOORTHY) 18 October 2007 claim 23
US 2017-0212695 A1 (MICRON TECHNOLOGY, INC.) 27 July 2017 paragraphs [0021]-[0022]
US 2015-0378817 A1 (RAMBUS INC.) 31 December 2015 paragraphs [0023]-[0045]; and figures 1-2B
US 10128842 B1 (MICRON TECHNOLOGY, INC.) 13 November 2018 claims 1-3
KR 10-2010-0090966 A (SAMSUNG ELECTRONICS CO., LTD.) 18 August 2010 paragraphs [0020]-[0029]; and figures 3-4
Special categories of cited documents:
document defining the general state of the art which is not considered to be of particular relevance
document cited by the applicant in the international application
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 2007-0245214 A1
18 October 2007
EP 2008363 A1
JP 2009-531767 A
JP 5356214 B2
KR 10-2009-0005359 A
US 2011-0258509 A1
US 7971130 B2
US 8869014 B2
WO 2007-116275 A1
31 December 2008
03 September 2009
04 December 2013
13 January 2009
20 October 2011
28 June 2011
21 October 2014
18 October 2007
US 2017-0212695 A1
27 July 2017
CN 108475520 A
EP 3405953 A1
KR 10-2018-0087472 A
TW 201732623 A
TW I627539 B
US 10365833 B2
US 2019-0332279 A1
WO 2017-127222 A1
31 August 2018
28 November 2018
01 August 2018
16 September 2017
21 June 2018
30 July 2019
31 October 2019
27 July 2017
US 2015-0378817 A1
31 December 2015
TW 200705453 A
US 10095565 B2
US 2006-0277434 A1
US 2011-0119551 A1
US 2013-0139032 A1
US 2015-0355964 A1
US 2015-0378818 A1
US 2016-0004597 A1
US 2019-0095264 A1
US 7831882 B2
US 8918703 B2
US 9141479 B2
US 9274892 B2
US 9459960 B2
US 9665430 B2
WO 2006-132840 A2
WO 2006-132840 A3
01 February 2007
09 October 2018
07 December 2006
19 May 2011
30 May 2013
10 December 2015
31 December 2015
07 January 2016
28 March 2019
09 November 2010
23 December 2014
22 September 2015
01 March 2016
04 October 2016
30 May 2017
14 December 2006
19 April 2007
US 10128842 B1
13 November 2018
CN 110299162 A
US 10411704 B1
US 2019-0296740 A1
01 October 2019
10 September 2019
26 September 2019
KR 10-2010-0090966 A
18 August 2010
US 2010-0202198 A1
US 8806302 B2
12 August 2010
12 August 2014
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:
19 March 2020
Date of mailing of the international search report:
19 March 2020
Authorized officer:
KWON, Sungho
Telephone No. +82-42-481-3547
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