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DIFF Subclass Not Allocatable
G99Z

SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION

Introduced: January 2006

Description

G99Z is a residual classification for physics-related inventions and technologies that do not fit within the more specific physics subclasses (G01–G98) of IPC Section G. This catch-all category captures novel or emerging physics applications, experimental apparatus, or interdisciplinary technologies where the primary technical character is physics-based but lacks a clearly defined home in the established classification scheme. Patents classified here typically represent edge cases, combinations of technologies, or genuinely new fields that predate formal classification development.

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

IPC defines codes here since 2006.

Child Classifications

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  • G99Z 99/00 Subject matter not otherwise provided for in this section since 2006 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class G99,2013–2023, worldwide · Source: EPO PATSTAT

  1. KOBORI SHIZU 32
  2. WANG LONG 16
  3. GAO XUEFENG 15
  4. JING YONGKANG 14
  5. SHEN XIAOBIN 8
  6. SIROIS, CHARLES CA 3
  7. AUBIN, BARRY N. CA 3
  8. MOHAMMADIAN ABKENAR, SEYED MOJTABA SMMA CA 3
  9. VOON, GERARD CA 3
  10. KIM, KWANG MIN KR 2

Top Applicants (CPC)

Class G99,2013–2023, worldwide · Source: EPO PATSTAT

  1. SIROIS, CHARLES CA 3
  2. DORRINGTON, ADRIAN, ANDREW NZ 3
  3. HAZAMA MOTOKO JP 2
  4. FRIEDLANDER, GREGORY M. US 2
  5. MOTOKO HAZAMA JP 2
  6. BEINKE, GARIN GLEN AU 2
  7. CAO SHOUYIN CN 1
  8. LADDHA, SHILPA S. DR IN 1
  9. HAZAMA MOTOKO 1
  10. AYUB, SHAHANAZ DR IN 1