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 category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '142') AND (category.subclass = '45') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '142'; Subclass is '45';

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 278,618 May 29, 1883 Machine for Making Brackets for Telegraph Insulators
Machine to turn wooden insulator pin brackets
SMITH, John B.
Pin Charles N. Freeman & David W. O'Neil
U 298,543 May 13, 1884 Machine for Turning Insulator Pins
Machine to turn wooden insulator pins
BALDWIN, Joseph A.

Total of 0.01 seconds