Search the Insulator Patent Reference Library:

Build your search criteria. The patent must match all the values specified.
Select patent types: Utility   Design   Reissue
Patent number:
Year between: and
Patentee starting with:
Assigned To starting with:
Description containing:
Class:    Subclass:
Click Search when complete:
SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN name ON name.patent = patent.patent AND name.type = patent.type WHERE (last_name = 'SCHWEDTMANN') AND (first_name = 'Ferdinand') ORDER BY date ASC, patent, type

Total of 2 patents found where: Last Name is 'SCHWEDTMANN'; First Name is 'Ferdinand';

View a patent by clicking on the patent number. You can sort by any of the columns by clicking on the column name.

T / S Patent Date Description Patentee Category Assigned To
U Specimen known 538,090 April 23, 1895 Electric Cut-Out
Fuse cut-out for transformer (see patent 552,680)
WAGNER, Robert A.
Fuse Holder  
U Specimen known 552,680 January 7, 1896 Electric Cut-Out and Insulator
Cut-out for transformer mounted on and integral to the transformer. (see patent 538,090)
WAGNER, Robert A.
Fuse Holder  

Total of 0.00 seconds