Drumhead

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5864077
SERIAL NO

08856986

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A polymer film drumhead having indentations in the surface, the indentations placed strategically by size, number and placement near the periphery of the drumhead to control the vibrational characteristics and the overtone content of the drumhead when struck.

First Claim

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Patent Owner(s)

Patent OwnerAddress
D'ADDARIO & COMPANY INC595 SMITH STREET FARMINGDALE NY 11735

International Classification(s)

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  • 1997 Application Filing Year
  • G10D Class
  • 141 Applications Filed
  • 45 Patents Issued To-Date
  • 31.92 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances1997199819992000200120020255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gatzen, Robert A Newington, CT 14 194

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Patent Citation Ranking

  • 16 Citation Count
  • G10D Class
  • 57.38 % this patent is cited more than
  • 26 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges3321951101 - 1011 - 2021 - 3031 - 4051 - 600246810121416182022242628303234

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