Items

• [CK620AAC1], Test Report, Edison Storage Battery Co, Roy Charles Mitchell, March 8th, 1915
  1915-03-08
• [CK620AAC2], Test Report, Edison Storage Battery Co, Roy Charles Mitchell, March 22nd, 1915
  1915-03-22
• [E1108BI], Technical Note, Roy Charles Mitchell, October 6th, 1911
  1911-10-06
• [NA197AAB], Technical Note, Roy Charles Mitchell, 1909
  1909-00-00
• [X501C03], Letter from Roy Charles Mitchell to John Vincent Miller, Robert Abraham Bachman, Harold Newton Cox, March 9th, 1918
  1918-03-09
• [X501C04], Letter from Roy Charles Mitchell to Harold Newton Cox, Robert Abraham Bachman, John Vincent Miller, March 12th, 1918
  1918-03-12
• [X501C08], Technical Note, Roy Charles Mitchell, September 8th, 1923
  1923-09-08