持許

第一七七〇五號
PATENT
NO. 17705
FEB. 26.1910
ROYAL KINJO
JAPAN

持許 = PATENT
第 = ORDINAL
號 = NUMBER
一七七〇五 = 17705

 Found on Nippon Sharkskin Porcelain ware

Per Joan F. Van Patten in her Nippon Porcelain Encyclopedia book Fifth Series, page 75, the patent was "filed by Yasunosuke Doi, who is also the inventor...filed on October 18 1909, and was allowed on February 26, 1910 (as evident by mark)...inventor's address was in Nagoya."

Patent information was obtained from Japan Patent Office but is in Japanese kanji and with partial translation (click here to see pdf file-2 page or individual pdf page 1 and page 2). Partial translation states the patent holder-inventor's name

保之助 土井 YASUNOSUKI DOI

保之助 YASUNOSUKE

土井 DOI

Patent Number 17705
Classification 57
The Applied Date:  October 18th, Meiji Era 42nd year (1909)
The Patent Granted Date:  February 26th, Meiji Era 43rd year (1910)
The Patent Holder (Inventor):  Yasunosuke Doi
55th Street Chitose-Cho Nishi-Ku Nagoya, Aichi, Japan

The Detailed Statement: The method to fire to place the materials onto the potteries and porcelains: (1) Summary of the characteristics and purposes of the invention and (2) Explanation of the invention details - (1) and (2) mentions that they painted first and then sprayed steam on the surface then sprinkled glass powder and fire the object to produce the surface.  This invention was used for export ceramics.

Regarding the name ROYAL KINJO - KINJO means GOLD and refers to gold silk brocade known for its brilliance and luster. This enamel resembles the brilliance and luster of gold silk brocade.

This maker is not the same maker of sharkskin ware found without the Nippon Royal Kinjo mark.

Please see TAKEUCHI, CHUBEI webpage.