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All Forums Category: General Philatelic Discussions (Non Country Specific) Forum: Stamp Production Process Forum

George C Howard Perforator Patent

 
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Author Previous TopicReplies: 1 / Views: 2,301Next Topic  
jogil
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Posted 10/20/2015   02:16 am  Show Profile Bookmark this topic Add jogil to your friends list Get a Link to this Message
Here are two different philatelic reference articles on the George

C Howard perforator with U.S. patent number 32,370 of 1861:

http://chronicle.uspcs.org/PDF/Chro..._20/5678.pdf (see page 2)

http://www.bnaps.org/hhl/TopicsDisp...p?issue=1853 (see page 24)

Did you notice any differences between the two articles?
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Edited by jogil - 10/20/2015 02:42 am

jogil
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Posted 10/21/2015   03:29 am  Show Profile Bookmark this reply Add jogil to your friends list  Get a Link to this Reply
Also note the following:

http://www.canadianpsgb.org.uk/mpl/...n05-w275.pdf (see page 216)

Stamp Perforations With Particular Emphasis On Canadian Stamps (see page 57)

http://www.google.com/patents/US32370
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Edited by jogil - 10/21/2015 07:25 am
  Previous TopicReplies: 1 / Views: 2,301Next Topic  
All Forums Category: General Philatelic Discussions (Non Country Specific) Forum: Stamp Production Process Forum
 
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