How many patents does
Contentguard Holdings have?
patents
305
families
53
granted
97
applications
208
US
155
JP
53
EP
36
CN
31
WO
6
KR
3
RoW
21
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The report contains ten-year analysis with the following sections
- patent filing analysis
- worldwide filing analysis
- patent family analysis
- application analysis
- granted analysis
- classification analysis
- citation analysis
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Contentguard Holdings
Top ten assignees appearing on patents
2009 - 2018
| contentguard holdings | 292 |
| contentgaurd holdings | 4 |
| contentguart holdings | 2 |
| contentguard holdings.inc | 2 |
| contentguard hoodings | 1 |
Contentguard Holdings
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| system and method for rendering content associated with a digital work | 48 | 1994 |
| method and apparatus for establishing usage rights for digital content to be created in … 🛈 | 33 | 2001 |
| method and apparatus for providing a specific user interface in a system for managing co… 🛈 | 14 | 2000 |
| system for controlling distribution and use of digital work | 12 | 1997 |
| system and method for managing transfer of rights using shared state variables | 12 | 2001 |
| method and apparatus for hierarchical assignment of rights to documents and documents ha… 🛈 | 12 | 2001 |
| system and method for digital rights management using a standard rendering engine | 12 | 2001 |
| system and method for digital rights management using advanced copy with issue rights, a… 🛈 | 11 | 2005 |
| method and apparatus for establishing usage rights for digital content to be created in … 🛈 | 9 | 2001 |
| extensible rights expression processing system | 8 | 2001 |