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Inventor

Cyrenus M. Rubald

Inventor
Naperville, IL, US

Overview

1→
Patents
1990
Patent span
Electricity
Primary field (CPC H)

Patents· 1 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Mprimary
H04MTelephonic communication50%
H04QSelecting50%
PatentTitleYear
4,899,375'More efficient call handling for operator assistance calls'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990Patents assigned to AMERICAN TELEPHONE & TELEGRAPH (1)· patent assignee history
1990Based in Naperville, IL, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
AMERICAN TELEPHONE & TELEGRAPH11990
Locations
LocationPatentsSpan
Naperville, Illinois, US11990