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Mamiya Seiichi

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Mamiya Seiichi (間宮精一)[1] (•17 Jan 1899 †6 Jan 1989) was Japanese inventor and camera designer. Together with the investor Tsunejiro Sugawara Mamiya founded the Mamiya Kōki Seisakusho (マミヤ光機製作所, Mamiya Optical Works). Tsunejiro Sugawara beame President of the Company,[2] while Mamiya Seiichi served as 'Chief Engineer' until his retirement in December 1954 and then as adviser.[3]

Camera Designs by Mamiya SeiichiEdit

PatentsEdit

The following patents were filed by Mamiya Seiichi or under his name.

JapanEdit

Type Application
date  
Application
number  
Publication
date  
Publication
number  
Grant
date  
Grant
number  
Title Relates to camera model
Utility model
(実用新案)
Jul. 1, 1939
(as a patent)
S15-17197  
(as a U.M.)
Oct. 5, 1940 S15-14673 n.a. 294734 写真機に於ける焦点調整装置
(Focusing control device in a camera)
Mamiya Six
Patent
(特許)
Oct. 11, 1940   S15-14993 Aug. 15, 1941   S16-4067   n.a. 146741 歯車連動装置に於ける歯隙の影響を解消する装置の改良
(Improvement to a device that cancels the effect of gear play in a gear train device)  
Mamiya Six

OverseasEdit

Date filed Date granted Country   Patent nº  Patent Title Relates to Camera Model
1929, 17 Apr     1930, 20 Mar     UK GB326688      Improvements In Or Relating To Photographic Cameras.[4] Never produced
? 1941, 22 Dec UK GB542016 Improvements In And Relating To Focusing Devices For Portable Photographic Cameras.   Mamiya Six
1940, 5 Jun 1942, 15 Dec USA US2305301 Focussing Device for Portable Photographic Cameras.[5] Mamiya Six
1955, 12 May 1957, 8 Oct USA US2808770 Camera rangefinder[6] Mamiya Six
1955, 12 May 1958, 27 May USA US2836109A Film winding and shutter setting mechanism for a camera Mamiya 16
1955, 20 Jun 1958, 24 Jun USA US2839976 Mechanism for setting shutter by film-winding operation in rollfilm camera[7] Mamiya Six
1966, 20 Jan 1968, 27 Aug USA US3398666A Camera Focus Adjusting Mechanism Mamiya RB67

Further reading Edit

In Japanese:

  • Mamiya Seiichi (間宮精一), "Wakaki gijutsusha no tame ni: Kamera gijutsusha no keiken kara" (若き技術者のために・カメラ技術者の経験から, For young engineers: From experienced camera engineers). Asahi Camera (アサヒカメラ) July 1951, pp. 87-89.

LinksEdit


Notes and ReferencesEdit

  1. The name is given in the Japanese order, with family name followed by the given name.
  2. Retired June 1966; † April 1988 (Mamiya. A History of Innovation. Mamiya 50th Anniversary. Produced by the Mamiya-History of Innovation Editorial Committee. Bunkyo-ku, Tokyo: Mamiya Camera Co. Ltd. p. 11).
  3. Mamiya. A History of Innovation. Mamiya 50th Anniversary. Produced by the Mamiya-History of Innovation Editorial Committee. Bunkyo-ku, Tokyo: Mamiya Camera Co. Ltd. p. 10
  4. While the application was successful, the Patent was never granted as Mamiya Seiichi apparently failed to pay the sealing fee.—Patent data
  5. Patent application by Seiichi Mamiya, Ohita, Takata-Gun, Japan.
  6. Patent application by Seiichi Mamiya, Bunkyo-Ku, Tokyo-to, Japan.
  7. Patent application by Seiichi Mamiya, Bunkyo-Ku, Tokyo-to, Japan.

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