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Government of Netherlands
Government
Active Patents
0
Total Holdings
2
Patent Holdings
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Patent No.
Title
Status
Filing Date
Grant Date
Claims
Actions
US2813929A
Automatic signalling system
Expired / Lapsed
1952-10-24
1957-11-19
0
Details
US2741665A
Control of an automatic signalling system
Expired / Lapsed
1952-11-12
1956-04-10
0
Details