G04C 21/20

Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm

Overview Structured Data Issues Contributors Activity

data.epo.org/linked-data/def/cpc/G04C21-20

Is a

‌

Patent classification

Other attributes

Child Classification

Classification Type

Cooperative Patent Classification

Parent Classification

‌

G04C 21/16

No article content yet.

Timeline

No Timeline data yet.

Further Resources

Title

Author

Link

Type

Date

No Further Resources data yet.

References

Find more entities like G04C 21/20

Use the Golden Query Tool to find similar entities by any field in the Knowledge Graph, including industry, location, and more.

Open Query Tool

Access by API