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Data input interface and method for inputting data

  • US 8,274,410 B2
  • Filed: 03/19/2008
  • Issued: 09/25/2012
  • Est. Priority Date: 10/22/2007
  • Status: Expired due to Fees
First Claim
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1. A data input interface for enabling user data input comprisinga first set of keys, wherein all or a majority of the keys are adapted to indicate an input of a first set of symbols, the keys being arranged in a first structure, anda second set of keys, wherein all or a majority of the keys are adapted to indicate an input of a second set of symbols, the keys being arranged in a second structure, wherein the first and second set of keys are integrated with each other,wherein keys of the second set are configured in a shape, such that the second set of keys presents a saw tooth like profile in order to distinguish the second set of keys from the first set of keys, andwherein the first set of keys is made of a hard material and the second set of keys is made of a soft plastic material.

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