Items

• [CJ616AAP], Letter from William Horatio Mason to Claude Heft Opdyke, July 31st, 1908
  1908-07-31
• [CM08AG], Letter from William Henry Meadowcroft to Claude Heft Opdyke, July 12th, 1915
  1915-07-12
• [CM08AM], Telegram from Thomas Alva Edison to Claude Heft Opdyke, August 4th, 1915
  1915-08-04
• [CM08AN], Telegram from Thomas Alva Edison to Claude Heft Opdyke, August 11th, 1915
  1915-08-11
• [CM08AO], Telegram from Thomas Alva Edison to Claude Heft Opdyke, September 8th, 1915
  1915-09-08
• [CM08AP], Telegram from Thomas Alva Edison to Claude Heft Opdyke, September 10th, 1915
  1915-09-10
• [CM08AQ], Telegram from Thomas Alva Edison to Claude Heft Opdyke, October 1st, 1915
  1915-10-01
• [CM08AQ1], Letter from William Henry Meadowcroft to Claude Heft Opdyke, October 12th, 1915
  1915-10-12
• [CM08AR], Letter from Mitsui & Co Ltd, Shunzo Takaki to Claude Heft Opdyke, November 8th, 1915
  1915-11-08
• [CM08AS], Telegram from William Horatio Mason to Claude Heft Opdyke, January 28th, 1916
  1916-01-28
• [CM08AT], Letter from William Henry Meadowcroft to Claude Heft Opdyke, February 11th, 1916
  1916-02-11
• [CM08AU], Telegram from William Henry Meadowcroft to Claude Heft Opdyke, February 21st, 1916
  1916-02-21
• [CM08AW], Telegram from William Henry Meadowcroft to Claude Heft Opdyke, March 29th, 1916
  1916-03-29
• [CM08AX], Letter from William Henry Meadowcroft to Claude Heft Opdyke, March 29th, 1916
  1916-03-29
• [CM08AY], Letter from William Henry Meadowcroft to Claude Heft Opdyke, April 17th, 1916
  1916-04-17
• [CM08BA], Letter from William Horatio Mason to Claude Heft Opdyke, September 7th, 1916
  1916-09-07
• [CM08BC], Letter from William Henry Meadowcroft to Claude Heft Opdyke, November 14th, 1916
  1916-11-14
• [CM08BD], Letter from Richard Wesley Kellow to Claude Heft Opdyke, November 20th, 1916
  1916-11-20
• [CM08BE], Letter from Stephen Babcock Mambert to Claude Heft Opdyke, October 30th, 1916
  1916-10-30
• [CM08BG], Letter from Richard Wesley Kellow to Claude Heft Opdyke, April 25th, 1917
  1917-04-25
• [CM08BI], Letter from Richard Wesley Kellow to Claude Heft Opdyke, May 7th, 1917
  1917-05-07
• [CM08BJ], Letter from Richard Wesley Kellow, Lee Addison Spindle to Claude Heft Opdyke, May 31st, 1917
  1917-05-31
• [CM08BK], Letter from Richard Wesley Kellow to Claude Heft Opdyke, June 20th, 1917
  1917-06-20
• [CM08BM], Letter from Richard Wesley Kellow to Claude Heft Opdyke, June 28th, 1917
  1917-06-28
• [CM08BN], Letter from Richard Wesley Kellow to Claude Heft Opdyke, June 28th, 1917
  1917-06-28
• [CM08BT], Letter from Richard Wesley Kellow to Claude Heft Opdyke, September 7th, 1917
  1917-09-07
• [CM08BU], Letter from Charles Edison to Claude Heft Opdyke, October 23rd, 1917
  1917-10-23
• [CM08BZ], Letter from New Jersey Products Inc, Archibald Clarence Emery to Claude Heft Opdyke, November 19th, 1917
  1917-11-19
• [CM08CB], Letter from New Jersey Products Inc, Archibald Clarence Emery to Claude Heft Opdyke, January 10th, 1918
  1918-01-10
• [CM08CE], Letter from Richard Wesley Kellow to Claude Heft Opdyke, January 26th, 1918
  1918-01-26
• [CM08CF], Letter from Archibald Clarence Emery, New Jersey Products Inc to Claude Heft Opdyke, February 25th, 1918
  1918-02-25
• [CM08CG], Letter from Richard Wesley Kellow to Claude Heft Opdyke, April 12th, 1918
  1918-04-12
• [E1518LBC], Telegram from William Horatio Mason to Claude Heft Opdyke, December 13th, 1915
  1915-12-13
• [E1518LBS], Telegram from William Horatio Mason to Claude Heft Opdyke, December 17th, 1915
  1915-12-17
• [E1518BAH], Telegram from William Horatio Mason to Claude Heft Opdyke, February 5th, 1915
  1915-02-05
• [E1518FCH], Letter from William Henry Meadowcroft to Claude Heft Opdyke, June 18th, 1915
  1915-06-18
• [E1518FCV], Letter from Thomas Alva Edison to Claude Heft Opdyke, June 25th, 1915
  1915-06-25
• [E1518GAH], Letter from William Henry Meadowcroft to Claude Heft Opdyke, July 3rd, 1915
  1915-07-03
• [E1518GAO], Letter from Thomas Alva Edison to Claude Heft Opdyke, July 6th, 1915
  1915-07-06
• [E1518GCB], Letter from Thomas Alva Edison to Claude Heft Opdyke, July 17th, 1915
  1915-07-17
• [E1518IDV], Letter from William Henry Meadowcroft to Claude Heft Opdyke, September 30th, 1915
  1915-09-30
• [E1616DBD], Letter from William Henry Meadowcroft to Claude Heft Opdyke, April 17th, 1916
  1916-04-17
• [E1616FBF], Letter from William Horatio Mason to Claude Heft Opdyke, June 16th, 1916
  1916-06-16
• [E1616IAH], Letter from William Henry Meadowcroft to Claude Heft Opdyke, September 7th, 1916
  1916-09-07
• [LB111234], Letter from William Henry Meadowcroft to Claude Heft Opdyke, March 29th, 1916
  1916-03-29
• [LB105295], Letter from William Henry Meadowcroft to Claude Heft Opdyke, July 6th, 1915
  1915-07-06
• [LB105309], Letter from Thomas Alva Edison to John Bacon, Jr., William Horatio Mason, Claude Heft Opdyke, July 6th, 1915
  1915-07-06
• [LB105498], Letter from Thomas Alva Edison to Claude Heft Opdyke, July 17th, 1915
  1915-07-17
• [LB106145], Letter from William Henry Meadowcroft to Claude Heft Opdyke, August 18th, 1915
  1915-08-18
• [LB106431], Letter from William Henry Meadowcroft to Claude Heft Opdyke, September 7th, 1915
  1915-09-07
• [LB106506], Letter from William Henry Meadowcroft to Claude Heft Opdyke, September 10th, 1915
  1915-09-10
• [LB106557], Letter from William Henry Meadowcroft to Claude Heft Opdyke, September 14th, 1915
  1915-09-14
• [LB106558], Letter from William Henry Meadowcroft to Claude Heft Opdyke, September 14th, 1915
  1915-09-14
• [LB108303], Letter from Thomas Alva Edison to Claude Heft Opdyke, November 23rd, 1915
  1915-11-23
• [LB110105], Letter from William Henry Meadowcroft to Claude Heft Opdyke, February 3rd, 1916
  1916-02-03
• [LB110192], Letter from William Henry Meadowcroft to Claude Heft Opdyke, February 8th, 1916
  1916-02-08
• [LB112175], Letter from William Henry Meadowcroft to Claude Heft Opdyke, May 18th, 1916
  1916-05-18
• [LB112470], Letter from William Henry Meadowcroft to Claude Heft Opdyke, June 7th, 1916
  1916-06-07
• [LB113345], Letter from Thomas Alva Edison to Claude Heft Opdyke, July 27th, 1916
  1916-07-27
• [LB115044], Letter from William Henry Meadowcroft to Claude Heft Opdyke, November 10th, 1916
  1916-11-10