References:
• www.indiapost.gov.in
• www.indianpost.com
• www.patentstorm.us/patents/6672623.html
• www.coxrail.com/cancellation
• www.linxglobal.com
• www.walesprint.com/print_technology.php
• www.rubberstamp.uk.com/DateTime.php#Electronic
• indiapost.nic.in
• en.wikipedia.org/wiki/Cancellation
• http://en.wikipedia.org/wiki/Cancellation_(mail)
• http://en.wikipedia.org/wiki/Postage_stamps_and_postah_history_of_India
• http://en.wikipedia.org/wiki/Cancellation_%28mail%29#Pictorial_cancellations
Other Links:
• Useful resource e-links related to 'Product Design'
• Mobility and Vehicle Design at IDC IIT Bombay
Case Study Downloads:
• Re-Designing of a Stamp Cancelling Device for India Post - pdf