Patent US-1911-1028502

This is a range finder for launching a projectile from airplane at a chosen point on the ground. Operator uses altitude measurement from barometer to select the appropriate marked adjustment on an overlay.

Sources

• Patent 1028502 document and bibliographic info on espacenet
• Patent 1028502 at google patents

• Inventor location: Inglewood (possibly an antique spelling), California
• Witnesses: Andre K. Martell, Hanne Mendenhall

Patent family descending from Patent US-1911-1028502

• Patent US-1911-1028502 (English title: Airplane sighting devices, National tech categories: USPC 356/27 • USPC 89/41.21 • USPC 89/41.19 • USPC 33/229)
• Patent GB-1911-16545 (English title: A Sighting Device for use on Aeroplanes or Dirigible Balloons, Supplementary to patent: Patent US-1911-1028502)

Year filed	1911
Year granted	1912
Office	US
Patent number	1028502
Inventors	Frank Lee Slack
Inventor country	US
Inventor location
Applicant person	Frank Lee Slack
Applicant firm
Applicant type	INDIV
Applicant is inventor?	Yes
Original title	Airplane sighting device
English title	Airplane sighting devices
Tech fields	airplane, navigation, subsystem, bomb, projectile, instrument, barometer, cybernetics, aiming, military
Filing date	1911/02/07
Full specification filed date
Application number
Grant date	1912/06/04
Granted?	Yes
Publication date
Supplementary to patent
Related to aircraft?	Yes
Serial number
Patent agent	Claude L. McKesson
Assigned to
National tech categories	USPC 356/27, USPC 89/41.21, USPC 89/41.19, USPC 33/229
IPCs	IPC G01P3/36
CPCs	CPC G01P3/36
Family year	1911
First filing?	Yes
Cites these patents
Citations from after 1930
Application ID
INPADOC family ID
Number of text pages	2
Number of diagram pages	2
Number of figures	5
Number of claims	6