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Microneedel-based pen device for drug delivery and method for using same

  • US 20090157041A1
  • Filed: 02/12/2009
  • Published: 06/18/2009
  • Est. Priority Date: 09/12/2001
  • Status: Active Grant
First Claim
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1. An injection mechanism for injecting fluid into a targeted tissue layer comprising:

  • a primary reservoir for storing fluid prior to injection having a first axis; and

    a secondary reservoir for holding the amount of fluid to be injected having a second axis, wherein the secondary reservoir is located co-axially and in series with the primary reservoir and has a smaller cross-sectional area than the cross-sectional area of the primary reservoir.

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